Assignment: 1. Cardinal symptoms of Rs n CVS in order of appearance 2. Chest pain causes 3. Rs n CVS causes of hemoptysis 4. Rs dyspnea grading (mmrc) 5. Define, clinical features, investigation, treatment, complications of all spotters

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Here is the complete assignment covering all five points:

RS & CVS - Complete Assignment

1. Cardinal Symptoms of RS and CVS (In Order of Appearance)

Respiratory System (RS) - Cardinal Symptoms

Order	Symptom	Note
1	Cough	Usually the earliest and most common presenting symptom
2	Dyspnea (Breathlessness)	Appears as disease progresses
3	Chest pain	Pleuritic or non-pleuritic
4	Hemoptysis	Coughing up blood
5	Wheeze	High-pitched whistling sound on breathing
6	Cyanosis	Central (lips, tongue) - late sign of hypoxia
7	Fever / Constitutional symptoms	Infection-related - weight loss, anorexia

Cardiovascular System (CVS) - Cardinal Symptoms

Order	Symptom	Note
1	Dyspnea (Breathlessness)	Earliest symptom - exertional initially
2	Chest pain / Angina	Central, crushing, radiates to left arm/jaw
3	Palpitations	Awareness of heartbeat - arrhythmias
4	Syncope / Pre-syncope	Transient loss of consciousness
5	Edema	Dependent pitting edema (ankle/sacral)
6	Fatigue	Reduced cardiac output
7	Cyanosis	Central (cardiac shunts) or peripheral
8	Hemoptysis	Classically in mitral stenosis

2. Causes of Chest Pain

Chest pain has a broad differential - organized by system:

A. Cardiac Causes

Ischemic: Stable angina, Unstable angina, Myocardial Infarction (STEMI/NSTEMI)
Pericarditis - sharp, positional, worse on lying flat, relieved leaning forward
Myocarditis
Cardiac tamponade
Aortic dissection - tearing/ripping pain radiating to back (life-threatening)

B. Pulmonary Causes

Pulmonary Embolism (PE) - pleuritic chest pain + dyspnea
Pneumothorax - sudden onset unilateral pleuritic pain + dyspnea
Pleurisy / Pleuritis - sharp, stabbing, worse with breathing
Pneumonia - pleuritic, with fever, productive cough
Pleural effusion
Lung cancer - dull, persistent, non-pleuritic

C. Gastrointestinal Causes

GERD / Acid reflux - burning, retrosternal, post-meal
Esophageal spasm - can mimic cardiac chest pain
Peptic ulcer disease
Hiatus hernia

D. Musculoskeletal Causes

Costochondritis (Tietze syndrome) - reproducible tenderness on palpation
Rib fracture
Intercostal muscle strain

E. Other Causes

Herpes Zoster (Shingles) - dermatomal, burning
Anxiety / Panic attack - functional chest pain
Mediastinitis

Mnemonic for life-threatening chest pain: PATCH MD - PE, Aortic dissection, Tension pneumothorax, Cardiac tamponade, MI, Dissection (esophageal rupture)

3. RS and CVS Causes of Hemoptysis

Definition: Expectoration of blood originating from the lower respiratory tract (below the glottis).

RS (Respiratory) Causes - By Category

Airway Disease:

Bronchiectasis (most common cause in developing countries)
Chronic bronchitis
Lung cancer / Bronchogenic carcinoma
Bronchial adenoma (carcinoid)
Foreign body
Tracheobronchitis
Cystic fibrosis

Parenchymal / Infection:

Tuberculosis (major cause - 15-25% in high TB-prevalence areas)
Pneumonia (bacterial, fungal, viral)
Lung abscess
Septic emboli
Aspergilloma ("fungus ball" - classically causes massive hemoptysis)

Vascular - Pulmonary:

Pulmonary embolism with infarction
Arteriovenous malformation (AVM)
Pulmonary artery pseudoaneurysm (Rasmussen's aneurysm - in TB)
Hereditary hemorrhagic telangiectasia (HHT)
Diffuse alveolar hemorrhage (Goodpasture syndrome, Wegener's, SLE)

Drugs / Iatrogenic:

Anticoagulants, antiplatelet agents
Cocaine inhalation
Post-lung biopsy

CVS (Cardiovascular) Causes

Cause	Mechanism
Mitral stenosis	Elevated left atrial pressure -> pulmonary venous hypertension -> rupture of bronchial veins / pulmonary capillaries
Left ventricular failure / Pulmonary edema	Raised pulmonary venous pressure causing "pink frothy" sputum
Pulmonary arterial hypertension	High pressure damages pulmonary vessels
Eisenmenger syndrome	Right-to-left shunt with pulmonary hypertension
Pulmonary veno-occlusive disease
Aortic aneurysm rupture into bronchus	Massive, life-threatening
Pulmonary artery catheter perforation (iatrogenic)

Note: 90% of hemoptysis arises from the bronchial circulation (high-pressure system); only 10% from pulmonary circulation. - Murray & Nadel's Textbook of Respiratory Medicine

Frequency order (decreasing): Bronchiectasis > Adenoma > Tracheobronchitis > Tuberculosis > Mitral stenosis > Foreign body (KJ Lee's Essential Otolaryngology)

4. Respiratory Dyspnea Grading - mMRC Scale

Modified Medical Research Council (mMRC) Dyspnea Scale

Grade	Description
0	Not troubled with breathlessness except with strenuous exercise
1	Troubled by shortness of breath when hurrying on the level or walking up a slight hill
2	Walks slower than people of the same age on the level because of breathlessness, OR has to stop for breath when walking at own pace on level
3	Stops for breath after walking about 100 yards (~90 m) or after a few minutes on the level
4	Too breathless to leave the house OR breathless when dressing/undressing

Source: Fishman's Pulmonary Diseases and Disorders - Data from ATS/ERS Task Force (Celli BR, MacNee W. Eur Respir J. 2004)

Clinical use: mMRC ≥2 indicates significant dyspnea. It is one of the four components of the BODE Index in COPD prognostication (Body mass index, Obstruction, Dyspnea, Exercise tolerance).

5. RS and CVS Spotters

RS SPOTTERS

A. CLUBBING

Definition: Bulbous enlargement of the terminal phalanges of fingers (and toes) due to proliferation of fibrovascular tissue, with loss of the normal angle between the nail and nail-bed (Lovibond angle >180°).

Grades of Clubbing (Schamroth's / Grades 1-4):

Grade	Features
I	Softening/fluctuation of nail bed
II	Loss of angle between nail and nail fold (Lovibond angle obliterated)
III	Increased curvature of nail (beak-like/parrot-beak appearance)
IV	Hypertrophic pulmonary osteoarthropathy (HPOA) - periosteal new bone formation

Schamroth's sign: Normally a diamond-shaped window is visible when the dorsal surfaces of the terminal phalanges of the same finger of both hands are placed together. In clubbing, this window is obliterated.

Clinical Features:

Fluctuant nail bed (early sign)
Loss of nail fold angle (most reliable early sign)
Increased nail curvature
Drumstick appearance of fingers
In HPOA: painful swollen wrists/ankles, periosteal reaction on X-ray

RS Causes:

Lung cancer (most common in adults)
Bronchiectasis
Lung abscess / Empyema
Fibrosing alveolitis (IPF)
Cystic fibrosis
Mesothelioma
TB (less common)

CVS Causes: Cyanotic congenital heart disease (Fallot's tetralogy, Eisenmenger), Infective endocarditis, Atrial myxoma

GI Causes: Cirrhosis, Crohn's disease, Ulcerative colitis, Celiac disease

Investigations:

CXR (primary lesion)
CT chest (mass, bronchiectasis, ILD)
PFTs (restrictive/obstructive pattern)
Bone scan (HPOA)
Echocardiography (if CVS cause suspected)

Treatment: Treat the underlying cause. Clubbing itself may partially regress when cause is treated (e.g., post-lobectomy for lung cancer). HPOA: NSAIDs, bisphosphonates.

Complications: Depends on underlying cause. HPOA causes significant joint pain and disability.

B. BARREL CHEST

Definition: Increased AP diameter of the chest equal to or exceeding the transverse diameter, with a horizontal (rather than sloping) rib orientation and elevated sternum, resembling a barrel.

Clinical Features:

Increased AP:transverse diameter ratio (normally 1:2; in barrel chest approaches 1:1)
Horizontal ribs
Widened intercostal spaces
Hyperresonance on percussion
Reduced chest expansion bilaterally
Decreased breath sounds
Prolonged expiration with expiratory wheeze
Use of accessory muscles of respiration

Causes:

COPD (emphysema) - most common
Severe chronic asthma
Air trapping from any cause

Investigations:

CXR: Hyperinflation, flat diaphragms, increased retrosternal air space, >6 anterior ribs visible above diaphragm in mid-clavicular line
CT chest: Emphysematous bullae, air trapping
Spirometry: Obstructive pattern (FEV1/FVC <0.7), increased RV and TLC, decreased DLCO (in emphysema)
ABG: May show hypoxemia, hypercapnia (type II respiratory failure)

Treatment:

SABA (Salbutamol), LABA, LAMA (tiotropium) bronchodilators
Inhaled corticosteroids
Pulmonary rehabilitation
O2 therapy (target SpO2 88-92% in COPD)
LTOT (long-term oxygen therapy) if PaO2 <55 mmHg
Lung volume reduction surgery / Bullectomy in selected cases
Lung transplantation (severe cases)

Complications: Cor pulmonale, Respiratory failure (Type II), Pneumothorax (bullae rupture), Frequent exacerbations, Death.

C. TRACHEAL DEVIATION

Definition: Displacement of the trachea from its normal midline position, detected by palpating the trachea in the suprasternal notch.

Clinical Features:

Trachea palpated off-centre in suprasternal notch
"Tracheal tug" may be present (downward movement of trachea with each heartbeat - in aortic arch aneurysm) or with forced inspiration in COPD

Causes:

Direction	Cause
Away from lesion (pushed)	Tension pneumothorax, Large pleural effusion, Large unilateral goitre
Toward lesion (pulled)	Pulmonary fibrosis (upper lobe), Collapse/Atelectasis, Post-pneumonectomy, Apical fibrosis (TB)

Investigations:

CXR (PA): Best initial test
CT chest: Detailed assessment
Spirometry (if fibrosis/COPD)

Treatment: Treat underlying cause:

Tension pneumothorax: Immediate needle decompression (2nd intercostal space, midclavicular line), then chest drain
Pleural effusion: Thoracocentesis
Lung fibrosis: Antifibrotics (pirfenidone, nintedanib for IPF)

Complications: Respiratory failure, mediastinal shift complications, cardiovascular compromise (especially tension pneumothorax).

D. PLEURAL EFFUSION

Definition: Abnormal accumulation of fluid in the pleural space (normally 10-20 mL).

Clinical Features:

Reduced/absent chest movement on affected side
Stony dull percussion (most characteristic sign)
Reduced/absent breath sounds
Reduced vocal resonance/fremitus
Bronchial breathing and aegophony above the effusion level (at the fluid meniscus)
Tracheal deviation away (large effusion)

Causes - Transudate (protein <30g/L):

Heart failure (bilateral)
Nephrotic syndrome
Liver cirrhosis
Hypothyroidism
Hypoalbuminemia

Causes - Exudate (protein >30g/L) - Light's Criteria:

Pneumonia (parapneumonic)
Malignancy (mesothelioma, metastatic)
TB
Pulmonary embolism
Connective tissue disease (SLE, RA)
Pancreatitis (left-sided)

Investigations:

CXR: Meniscus sign, blunting of costophrenic angle (>200mL needed)
USS chest: Confirms effusion, guides aspiration
CT chest: Detects underlying cause
Diagnostic aspiration (pleural tap): Protein, LDH, pH, glucose, cytology, culture, Light's criteria
Light's Criteria (exudate if ANY): Pleural protein/serum protein >0.5; Pleural LDH/serum LDH >0.6; Pleural LDH >2/3 upper limit serum LDH

Treatment:

Transudate: Treat underlying cause (diuretics for CCF, albumin for cirrhosis)
Exudate: Treat cause + therapeutic thoracocentesis
Malignant: Pleurodesis (talc), indwelling pleural catheter
Parapneumonic: Antibiotics ± chest drain
Empyema: Chest drain + antibiotics ± VATS decortication

Complications: Respiratory failure, Empyema, Fibrothorax, Trapped lung, Pneumothorax (post-aspiration), Mediastinal shift.

E. PNEUMOTHORAX (as RS spotter - may present with hyperresonance, absent breath sounds)

Definition: Presence of air in the pleural space.

Types:

Spontaneous: Primary (young, tall, thin male, no lung disease) or Secondary (underlying lung disease - COPD, TB, asthma, CF)
Traumatic
Iatrogenic (post-procedure)
Tension pneumothorax (medical emergency)

Clinical Features:

Sudden onset pleuritic chest pain + dyspnea
Reduced chest movement on affected side
Hyperresonance on percussion (vs stony dull in effusion)
Reduced/absent breath sounds
Tracheal deviation AWAY (tension pneumothorax only)
Tension PTX: Tachycardia, hypotension, JVD, tracheal deviation - haemodynamically unstable

Investigations:

CXR: Visible lung edge with absent vascular markings peripheral to it
CT chest: Gold standard (especially for small/recurrent)
ABG: Hypoxemia

Treatment:

Small primary (<2cm): Observation ± aspiration
Large (>2cm): Needle aspiration or chest drain (Seldinger technique)
Tension PTX: IMMEDIATE needle decompression (2nd ICS MCL), then chest drain
Recurrent: Pleurodesis or VATS bullectomy

Complications: Tension pneumothorax, Recurrence (20-50%), Haemopneumothorax, Re-expansion pulmonary edema, Respiratory failure, Death.

F. CONSOLIDATION / LOBAR PNEUMONIA

Definition: Replacement of alveolar air by fluid (exudate, pus, blood) resulting in a solid-appearing lung segment on CXR.

Clinical Features:

Fever, productive cough (rusty sputum in pneumococcal)
Pleuritic chest pain
Reduced chest expansion
Dull percussion
Bronchial breathing (hallmark)
Increased vocal resonance / whispering pectoriloquy
Crepitations

Causes: Streptococcus pneumoniae (most common), Klebsiella (upper lobe, diabetics), Staphylococcus, Legionella, Mycoplasma

Investigations:

CXR: Homogeneous opacity with air bronchogram, lobar distribution
Sputum culture, Blood culture
FBC: Leukocytosis
Urinary antigen (Legionella, Pneumococcal)
ABG if severe

Treatment (Community-acquired - CURB-65 guided):

CURB-65 0-1: Amoxicillin PO (Penicillin G)
CURB-65 2: Co-amoxiclav ± Macrolide, consider hospitalization
CURB-65 3-5: IV broad-spectrum (co-amoxiclav + clarithromycin), ICU if severe
Atypical: Macrolide or Doxycycline

CURB-65: Confusion, Urea >7mmol/L, Respiratory rate ≥30, BP systolic <90 or diastolic ≤60, Age ≥65 (1 point each; score 3+ = severe)

Complications: Empyema, Lung abscess, Septicemia, ARDS, Respiratory failure, Pleuritis.

G. BRONCHIECTASIS

Definition: Permanent, abnormal dilatation of the bronchi (>1.5x diameter of accompanying pulmonary artery) due to destruction of bronchial wall elastic and muscular components.

Clinical Features:

Chronic productive cough with large volumes of purulent sputum (3-layered sputum: mucoid top, mucopurulent middle, purulent bottom)
Recurrent chest infections
Hemoptysis (common, may be massive)
Clubbing
Coarse crepitations on auscultation
Wheeze

Causes:

Post-infective: TB, Pertussis, Measles, Pneumonia
Immunodeficiency
Cystic fibrosis (commonest genetic cause)
Kartagener syndrome (ciliary dyskinesia)
ABPA (allergic bronchopulmonary aspergillosis)
Obstruction (foreign body, tumour)
Yellow nail syndrome

Investigations:

HRCT chest: Gold standard - "signet ring" appearance (bronchus > pulmonary artery), "tram-track" lines
CXR: Tram-tracking, ring shadows, crowded lung markings
Spirometry: Obstructive or mixed pattern
Sputum culture (Pseudomonas, H. influenzae, Staph. aureus in CF)
Sweat chloride test (if CF suspected)
Serum immunoglobulins
ABPA screen (IgE, aspergillus precipitins)

Treatment:

Chest physiotherapy (postural drainage) - cornerstone
Antibiotics: Guided by sputum culture (Amoxicillin, Ciprofloxacin for Pseudomonas)
Bronchodilators (SABA, LABA)
Inhaled corticosteroids (if ABPA or asthma-overlap)
Mucolytics (hypertonic saline, DNase in CF)
Surgery: Lobectomy/segmentectomy for localized disease unresponsive to medical Rx

Complications: Massive hemoptysis, Respiratory failure, Cor pulmonale, Amyloidosis (AA type - secondary), Brain abscess (hematogenous spread), Empyema.

H. PNEUMOTHORAX (see above)

CVS SPOTTERS

A. MITRAL FACIES (Malar Flush)

Definition: A purplish-red flush over the malar prominences (cheeks) and nose, seen classically in mitral stenosis, due to reduced cardiac output causing peripheral vasodilatation and venous stasis in the facial skin.

Clinical Features:

Bilateral malar flush (purplish-red discoloration of cheeks)
Signs of mitral stenosis: Dyspnea, orthopnea, hemoptysis, palpitations
Low-volume pulse
Tapping apex beat (palpable S1)
Loud S1, Opening snap (OS), Mid-diastolic rumble with presystolic accentuation at apex
Signs of pulmonary hypertension: Loud P2, RV heave
AF (later complication)

Investigations:

ECG: P-mitrale (bifid P wave), AF
CXR: Enlarged left atrium (double shadow, splaying of carina), pulmonary venous congestion, Kerley B lines
Echocardiography (TTE/TEE): Gold standard - valve area <1 cm² (severe), gradient across valve, commissural fusion
Cardiac catheterisation (if echo inconclusive)

Treatment:

Medical: Diuretics, beta-blockers/digoxin (rate control in AF), anticoagulation (warfarin if AF, history of embolism)
Percutaneous Mitral Balloon Valvuloplasty (PMBV) / Balloon Commissurotomy: Preferred intervention (pliable, non-calcified valve without MR)
Surgical: Open mitral commissurotomy or Mitral valve replacement (MVR) - calcified/regurgitant valve
Antibiotic prophylaxis: No longer routinely recommended except in highest-risk groups (prosthetic valve, prior IE)

Complications: Atrial fibrillation, Systemic embolism/stroke, Pulmonary hypertension, Cor pulmonale, Infective endocarditis, Pulmonary edema, Right heart failure.

B. JUGULAR VENOUS PULSE (JVP) - RAISED JVP

Definition: The JVP is the visible pulsation in the neck (internal jugular vein) that reflects right atrial pressure. Normally the JVP is measured at <4 cm above the sternal angle (45° position).

JVP Waveform:

a wave: Atrial systole (absent in AF, giant in tricuspid stenosis, cannon waves in complete heart block)
c wave: Tricuspid valve closure (often not visible)
x descent: Atrial relaxation
v wave: Venous filling when tricuspid is closed (giant v wave in tricuspid regurgitation)
y descent: Tricuspid opens, blood flows to RV

Causes of Raised JVP:

Right heart failure (most common)
Cardiac tamponade (raised JVP + hypotension + muffled heart sounds = Beck's triad)
Constrictive pericarditis (Kussmaul's sign: JVP rises on inspiration)
Superior vena cava obstruction (non-pulsatile raised JVP)
Fluid overload
Tension pneumothorax

Investigations:

ECG
CXR
Echocardiography (RA pressure, pericardial effusion)
CT chest/abdomen (SVC obstruction)

Treatment: Treat underlying cause - diuretics for right heart failure, pericardiocentesis for tamponade.

C. PEDAL EDEMA (Dependent Pitting Edema)

Definition: Abnormal accumulation of interstitial fluid in the feet and ankles due to increased capillary hydrostatic pressure, reduced oncotic pressure, or lymphatic obstruction.

Grading:

Grade 1: Ankle edema only
Grade 2: Pitting edema up to knee
Grade 3: Pitting edema up to thigh/genitalia
Grade 4: Anasarca (total body edema)

Clinical Features:

Pitting edema (finger pressure leaves a pit)
Bilateral (cardiac/systemic) vs Unilateral (DVT, lymphedema)
Associated signs: Raised JVP, S3 gallop, hepatomegaly, ascites (right heart failure)

Causes:

Cardiac: Right heart failure, Constrictive pericarditis, Cardiomyopathy
Renal: Nephrotic syndrome, Renal failure
Hepatic: Cirrhosis, hypoalbuminemia
Venous: DVT, chronic venous insufficiency
Lymphatic: Lymphedema
Drugs: CCBs (amlodipine), NSAIDs, corticosteroids

Investigations:

FBC, U&E, LFTs, Albumin, BNP/NT-proBNP
CXR, Echocardiography
Urinalysis (proteinuria for nephrotic), 24-hr urine protein
Doppler ultrasound (DVT)

Treatment:

Diuretics (furosemide) - first-line for cardiac cause
Leg elevation
Compression stockings (if no arterial disease)
Fluid restriction
Treat underlying cause

Complications: Skin breakdown/ulceration, Infection (cellulitis), DVT, Pulmonary edema, Pleural effusion.

D. INFECTIVE ENDOCARDITIS (IE) - Peripheral Stigmata

Definition: Infection of the endocardium (usually heart valves) by microorganisms, most commonly bacteria.

Classic Peripheral Signs (Clinical Spotters):

Sign	Description	Location
Osler's nodes	Painful, tender, red nodules	Finger/toe pads
Janeway lesions	Painless hemorrhagic macules	Palms/soles
Splinter hemorrhages	Linear red-brown lines	Under nails
Roth spots	Oval retinal hemorrhages with pale centre	Retina
Clubbing	Late finding	Fingers
Petechiae	Small capillary hemorrhages	Conjunctiva, skin

Duke Criteria (Definite IE = 2 Major OR 1 Major + 3 Minor OR 5 Minor):

Major: Positive blood cultures (2 of typical organisms), Positive echo (vegetation, abscess, new valve regurgitation)
Minor: Predisposing cardiac condition/IVDU, fever >38°C, vascular phenomena, immunologic phenomena, microbiologic evidence not meeting major

Investigations:

Blood cultures x3 (before antibiotics, from different sites)
FBC (leukocytosis, anemia), ESR/CRP raised
Urinalysis (microscopic hematuria)
CXR
ECG (AV block = septal abscess)
Echocardiography: TTE first, TEE if negative/inconclusive (more sensitive)

Treatment:

Viridans streptococci (native valve): Benzylpenicillin + Gentamicin (2 weeks)
Staphylococcus aureus (native valve): Flucloxacillin ± Gentamicin (4-6 weeks)
Prosthetic valve: Vancomycin + Rifampicin + Gentamicin (6 weeks)
Surgery indications: Heart failure, Persistent bacteraemia, Perivalvular extension, Embolic events, Large vegetations (>10mm)

Complications: Embolic (stroke, splenic/renal infarct), Perivalvular abscess, Heart block, Heart failure (acute MR/AR), Mycotic aneurysm, Metastatic infection, Death.

E. CARDIAC CACHEXIA / CYANOSIS (Central - CVS cause)

Definition (Central Cyanosis): Blue discolouration of mucous membranes (tongue, lips) due to >5g/dL deoxygenated Hb in blood or abnormal Hb. In CVS, it implies right-to-left shunting.

Clinical Features:

Blue tongue and lips (central cyanosis)
Clubbing (in chronic cases)
RV heave, Loud P2 (pulmonary hypertension)
Single S2 (Fallot's) or loud P2 (Eisenmenger's)
Murmurs of underlying cardiac defect

Causes (CVS):

Tetralogy of Fallot (most common cyanotic CHD after neonatal period)
Eisenmenger syndrome
Transposition of great arteries (TGA)
Tricuspid atresia
Total anomalous pulmonary venous return (TAPVR)
Pulmonary hypertension with right-to-left shunt

Investigations:

SpO2 (reduced, <95%)
ABG: PaO2 reduced, does not fully correct with 100% O2 (vs RS cause)
CXR: Cardiomegaly, pulmonary plethora or oligemia
ECG: RVH, RAD
Echocardiography: Defines structural defect
Cardiac catheterisation: Pressures, shunt calculation (Qp:Qs ratio)

Treatment:

Fallot's: Total surgical correction (right ventriculotomy + VSD patch + RVOT relief)
Eisenmenger: Pulmonary vasodilators (sildenafil, bosentan), Heart-lung transplant
Supportive: Avoid dehydration, polycythemia management (venesection if PCV >0.65)

Complications: Polycythemia, Paradoxical embolism, Brain abscess, Endocarditis, Arrhythmias, Pulmonary hemorrhage, Death.

F. AORTIC STENOSIS (AS) - Classic CVS Spotter Signs

Definition: Narrowing of the aortic valve orifice causing obstruction to LV outflow. Normal valve area 2-4 cm²; severe AS <1 cm².

Clinical Triad (SAD):

Syncope
Angina
Dyspnea (exertional)

Clinical Signs:

Slow-rising, low-amplitude pulse (pulsus parvus et tardus)
Narrow pulse pressure
Sustained, heaving apex beat (not displaced early)
Ejection systolic murmur (ESM) at aortic area, radiating to carotids
Soft/absent A2
S4 gallop (LVH)

Investigations:

ECG: LVH with strain
CXR: Calcified aortic valve (lateral), post-stenotic dilatation of aorta
Echocardiography: Valve area (severe <1 cm²), mean gradient (>40 mmHg = severe)
Cardiac catheterization (pre-op in older patients)

Treatment:

Medical: Diuretics, ACE inhibitors (cautiously), statins do NOT slow progression
Avoid: Vigorous exercise, vasodilators (nitrates, alpha-blockers)
Surgical Aortic Valve Replacement (SAVR): Standard in younger, low surgical risk
TAVI/TAVR: Transcatheter - moderate-to-high surgical risk patients
Indications for intervention: Severe AS + symptoms (any of SAD), LVEF <50%, High-gradient

Complications: Sudden cardiac death, Heart failure, Infective endocarditis, Arrhythmias (AF, heart block if calcification extends to conduction system), Complete heart block.

G. MITRAL REGURGITATION (MR)

Definition: Incompetence of the mitral valve allowing regurgitation of blood from LV to LA during systole.

Causes:

Rheumatic heart disease
MVP (mitral valve prolapse)
Papillary muscle dysfunction (post-MI)
Infective endocarditis
Dilated cardiomyopathy
Marfan syndrome

Clinical Features:

Displaced, hyperdynamic apex beat
Soft/absent S1
Pansystolic murmur at apex radiating to axilla
S3 (volume overload)
Signs of pulmonary hypertension (loud P2)

Investigations:

ECG: P-mitrale, LVH, AF
CXR: Cardiomegaly, enlarged LA, pulmonary edema (acute)
Echocardiography: Regurgitant jet, LV function, LA size

Treatment:

Acute severe MR: Emergency surgery
Chronic asymptomatic: Monitor; surgery when LVEF <60% or LVESD >40mm
Surgical: Mitral valve repair (preferred) or replacement
Medical: ACE inhibitors, diuretics, anticoagulation if AF

Complications: AF, systemic embolism, heart failure, pulmonary hypertension, infective endocarditis.

H. HYPERTENSION - RETINAL CHANGES (Keith-Wagener-Barker Classification)

Definition: Persistent BP >140/90 mmHg causing target organ damage including hypertensive retinopathy.

Grades (Keith-Wagener Classification):

Grade	Features
I	Mild narrowing/tortuosity of arteries (silver wiring)
II	AV nipping/nicking (arteriovenous crossing changes)
III	Flame-shaped hemorrhages, cotton wool spots, hard exudates
IV	All of Grade III + Papilledema (hypertensive emergency)

Clinical Features:

Usually asymptomatic until advanced
Headache, visual disturbance (Grade III-IV)
Papilledema in hypertensive emergency

Investigations:

Fundoscopy: Gold standard for grading
BP measurements (bilateral arm)
Urinalysis, U&E, eGFR (renal damage)
ECG, Echo (LVH)
24-hr ambulatory BP monitoring

Treatment:

Grade I-II: Target BP <130/80 mmHg with antihypertensives
Grade III-IV (Hypertensive emergency): IV labetalol or sodium nitroprusside; aim to reduce MAP by no more than 25% in first hour
First-line antihypertensives: ACE inhibitor/ARB, CCB, Thiazide diuretic (ACD rule - Age/ethnicity guided)

Complications: Stroke, MI, Renal failure, Heart failure, Aortic dissection, Blindness (retinal artery/vein occlusion), Hypertensive encephalopathy.

Sources: Murray & Nadel's Textbook of Respiratory Medicine | Fishman's Pulmonary Diseases and Disorders | Frameworks for Internal Medicine | Symptom to Diagnosis (Evidence-Based Guide) | KJ Lee's Essential Otolaryngology | Harrison's Principles of Internal Medicine

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