The syndrome of a systemic hypertension and hypotension (complaints, classification, criteria of diagnostics). The syndrome of a pulmonary hypertension and pulmonary heart (complaints, classification, criteria of diagnostics). Notes on ot explained clearly
Reading File
Searching for both syndromes in parallel — systemic hypertension/hypotension classification and diagnostic criteria, and pulmonary hypertension/cor pulmonale classification and criteria.
search_medical_text
systemic arterial hypertension hypotension classification diagnostic criteria complaints symptoms
Classification of Cardiogenic Shock
Page 6
search_medical_text
pulmonary hypertension pulmonary heart cor pulmonale classification diagnostic criteria symptoms
Harrison's Principles of Internal Medicine, Twenty First Edition
Page 14908
GradeResponse
GradeResponse
Good references found. Now I have comprehensive knowledge to build a thorough, well-structured answer. Let me synthesize from the retrieved sources combined with established clinical knowledge (Harrison's, JNC/ESC/ESH guidelines, WHO pulmonary hypertension classification).
Syndromes of Systemic Hypertension & Hypotension + Pulmonary Hypertension & Pulmonary Heart
PART 1 — SYNDROME OF SYSTEMIC ARTERIAL HYPERTENSION (SAH)
Definition
Systemic arterial hypertension is a sustained elevation of blood pressure (BP) ≥ 140/90 mmHg on at least 2 separate occasions using proper measurement technique (ESC/ESH 2018 Guidelines).
Complaints (Symptoms)
Patients may be asymptomatic for years ("silent killer"), but can present with:
| Category | Symptoms |
|---|---|
| Cerebral | Headache (occipital, worse in the morning), dizziness, visual disturbances, tinnitus |
| Cardiac | Palpitations, chest discomfort, dyspnea on exertion |
| Renal | Nocturia, polyuria (hypertensive nephropathy) |
| Hypertensive urgency/crisis | Severe headache, vomiting, blurred vision, altered consciousness, nosebleeds |
Classification
By Etiology
| Type | Description |
|---|---|
| Primary (Essential) Hypertension | ~90–95% of cases; no identifiable cause; multifactorial (genetic + environmental) |
| Secondary Hypertension | ~5–10%; identifiable cause (renal artery stenosis, primary hyperaldosteronism, pheochromocytoma, Cushing's syndrome, sleep apnea, medications) |
By BP Level (ESC/ESH 2018)
| Category | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Optimal | < 120 | < 80 |
| Normal | 120–129 | 80–84 |
| High-normal | 130–139 | 85–89 |
| Grade 1 HTN | 140–159 | 90–99 |
| Grade 2 HTN | 160–179 | 100–109 |
| Grade 3 HTN | ≥ 180 | ≥ 110 |
| Isolated systolic HTN | ≥ 140 | < 90 |
By Target Organ Damage (TOD) — Clinical Stages
| Stage | Description |
|---|---|
| Stage 1 | No TOD; no associated clinical conditions |
| Stage 2 | Asymptomatic TOD (LVH, carotid plaques, microalbuminuria, CKD stage 3, retinopathy grade I–II) |
| Stage 3 | Established CVD or symptomatic TOD (stroke, MI, heart failure, retinopathy grade III–IV, CKD stage ≥ 4, PAD) |
Diagnostic Criteria
- Office BP measurement: ≥ 140/90 mmHg on ≥ 2 separate visits
- Ambulatory BP Monitoring (ABPM): 24h average ≥ 130/80; daytime ≥ 135/85; nighttime ≥ 120/70
- Home BP monitoring (HBPM): Average ≥ 135/85 mmHg
Workup includes:
- Fasting glucose, lipid profile, creatinine/eGFR, electrolytes, urinalysis (protein, microalbumin)
- ECG (LVH — Sokolow-Lyon, Cornell criteria)
- Echocardiography (LVH, diastolic dysfunction)
- Fundoscopy (Keith-Wagener-Barker retinopathy grading)
- Renal ultrasound, renal artery Doppler (if secondary HTN suspected)
PART 2 — SYNDROME OF SYSTEMIC HYPOTENSION (ARTERIAL HYPOTENSION)
Definition
Arterial hypotension is defined as a sustained systolic BP < 100 mmHg (some criteria use < 90 mmHg) or a mean arterial pressure (MAP) ≥ 30 mmHg below individual baseline (Classification of Cardiogenic Shock, p. 6).
Complaints (Symptoms)
| System | Symptoms |
|---|---|
| Cerebral hypoperfusion | Dizziness, lightheadedness, presyncope/syncope, fatigue, difficulty concentrating |
| Cardiovascular | Palpitations (reflex tachycardia), chest pain (in severe cases) |
| Constitutional | Chronic weakness, cold extremities, pallor |
| Orthostatic | Dizziness/blackout on standing, falls |
Classification
| Type | Description |
|---|---|
| Primary (Constitutional) Hypotension | Low BP without organic cause; common in young, asthenic women |
| Orthostatic (Postural) Hypotension | Drop in SBP ≥ 20 mmHg or DBP ≥ 10 mmHg within 3 min of standing |
| Secondary Hypotension | Due to identifiable cause (hypovolemia, Addison's disease, hypothyroidism, autonomic neuropathy, medications) |
| Cardiogenic Hypotension/Shock | SBP ≤ 90 mmHg or MAP ≥ 30 below baseline; due to reduced cardiac output (MI, severe HF) |
| Distributive | Septic, anaphylactic, neurogenic shock — vasodilation causing relative hypovolemia |
Diagnostic Criteria
| Parameter | Criterion |
|---|---|
| Acute/Shock | SBP ≤ 90 mmHg sustained or MAP ≥ 30 mmHg below baseline |
| Orthostatic HTN | SBP drop ≥ 20 mmHg or DBP drop ≥ 10 mmHg within 3 min of standing |
| Primary hypotension | Chronic SBP < 100 mmHg with no identifiable cause |
Workup includes:
- Orthostatic BP series (lying → sitting → standing)
- ECG, echocardiography (cardiogenic cause)
- CBC, cortisol, TSH (endocrine causes)
- Electrolytes, lactate (shock evaluation)
- Tilt-table test (vasovagal syncope)
PART 3 — SYNDROME OF PULMONARY HYPERTENSION (PH)
Definition
Pulmonary hypertension is defined by a mean pulmonary artery pressure (mPAP) > 20 mmHg at rest, measured by right heart catheterization (RHC) — updated 2022 ESC/ERS Guidelines (previously >25 mmHg).
Complaints (Symptoms)
(Harrison's Principles, 21st ed., p. 14908)
| Symptom | Notes |
|---|---|
| Dyspnea on exertion | Most common presenting complaint; insidious onset |
| Fatigue and weakness | Due to reduced cardiac output |
| Chest pain | Exertional; from RV ischemia or pulmonary artery distension |
| Palpitations | Arrhythmias from RV strain |
| Syncope/presyncope | Especially on exertion — poor prognostic sign; reflects fixed low output |
| Hemoptysis | Particularly in PAH, CTEPH |
| Hoarseness | Ortner's syndrome — compression of recurrent laryngeal nerve by dilated PA |
| Peripheral edema, ascites | Features of right heart failure (cor pulmonale) |
Classification (WHO/ERS 2022 — 5 Groups)
| Group | Category | Examples |
|---|---|---|
| Group 1 | Pulmonary Arterial Hypertension (PAH) | Idiopathic, hereditary (BMPR2), drug/toxin-induced, CTD-associated, congenital heart disease, HIV, portal hypertension |
| Group 2 | PH due to Left Heart Disease | HFpEF, HFrEF, valvular disease (mitral stenosis) |
| Group 3 | PH due to Lung Disease / Hypoxia | COPD, ILD, sleep-disordered breathing, high altitude |
| Group 4 | Chronic Thromboembolic PH (CTEPH) | Unresolved PE → organized thrombus → obstruction |
| Group 5 | PH with Unclear/Multifactorial Mechanisms | Hematologic disorders (polycythemia vera), systemic disorders (sarcoidosis), metabolic disorders |
Diagnostic Criteria
Clinical
- Symptoms of exertional dyspnea + signs of RV overload in absence of primary left heart/lung disease → suspect PH
Non-Invasive Workup
| Test | Findings in PH |
|---|---|
| ECG | P pulmonale, right axis deviation, RVH (R > S in V1), ST depression V1–V4, RBBB (Harrison's, p. 14908) |
| Chest X-ray | Enlarged pulmonary arteries (>16 mm right descending PA), oligemic peripheral lung fields, RV enlargement, loss of retrosternal space |
| Echocardiography | Estimated RVSP > 35–40 mmHg (tricuspid regurgitation jet), RV dilation/hypertrophy, septal flattening ("D-sign"), dilated RA, IVC plethora |
| CT pulmonary angiography | PA diameter > 29 mm, mosaic attenuation, RV:LV ratio > 1, CTEPH thrombi |
| Pulmonary function tests | Reduced DLCO (PAH, ILD), obstructive pattern (COPD) |
| 6-minute walk test | Reduced; used for functional class and prognosis |
| BNP/NT-proBNP | Elevated; reflects RV wall stress |
| Sleep study | Exclude OSA as Group 3 cause |
| Serology | ANA, anti-dsDNA, anti-Scl-70, RF (CTD-associated PAH) |
Gold Standard: Right Heart Catheterization (RHC)
| Parameter | Criterion |
|---|---|
| mPAP | > 20 mmHg |
| Pulmonary Vascular Resistance (PVR) | > 2 Wood units (for PAH — Group 1) |
| PCWP (pulmonary capillary wedge pressure) | ≤ 15 mmHg (distinguishes pre-capillary from post-capillary PH) |
| Vasoreactivity test (for PAH) | Acute drop in mPAP ≥ 10 mmHg to ≤ 40 mmHg = "responder" → consider CCB therapy |
Functional Classification (WHO/NYHA Adaptation)
| Class | Description |
|---|---|
| I | No symptoms at ordinary activity |
| II | Slight limitation; comfortable at rest; symptoms with ordinary activity |
| III | Marked limitation; comfortable at rest; symptoms with minimal activity |
| IV | Unable to perform any activity without symptoms; symptoms at rest; signs of RV failure |
PART 4 — SYNDROME OF PULMONARY HEART (COR PULMONALE)
Definition
Cor pulmonale is right ventricular hypertrophy and/or dilatation caused by pulmonary hypertension secondary to diseases of the lungs, thorax, or pulmonary vasculature — explicitly excluding primary left heart disease or congenital heart disease.
Complaints (Symptoms)
| Symptom | Mechanism |
|---|---|
| Dyspnea (dominant complaint) | Elevated RV filling pressures + hypoxemia |
| Fatigue, exercise intolerance | Reduced RV output |
| Peripheral edema (ankles, legs) | RV failure → increased venous pressure |
| Right upper quadrant pain | Hepatic congestion (passive) |
| Abdominal distension/ascites | Portal hypertension from hepatic venous congestion |
| Syncope on exertion | Fixed low cardiac output |
| Cough, wheeze, sputum | Underlying lung disease (COPD most common) |
| Cyanosis | Central (V/Q mismatch) + peripheral (low output) |
Classification
By Onset
| Type | Description |
|---|---|
| Acute cor pulmonale | Sudden RV dilation without hypertrophy; classic cause = massive pulmonary embolism |
| Chronic cor pulmonale | Progressive RVH + dilation; causes include COPD, ILD, CTEPH, sleep apnea, neuromuscular disease |
By Cause (same as PH Groups 3, 4, 5 mainly)
- Most common: COPD (~80–85% of chronic cor pulmonale)
- Others: ILD, kyphoscoliosis, severe obesity hypoventilation, CTEPH
Diagnostic Criteria
| Modality | Findings |
|---|---|
| ECG | P pulmonale (peaked P ≥ 2.5 mm in II/III/aVF), right axis deviation (> +90°), RVH (R:S > 1 in V1, S1Q3T3 pattern in acute PE), RBBB |
| Chest X-ray | Enlarged central pulmonary arteries, RV enlargement (cardiac apex elevation, loss of retrosternal space on lateral), "pruning" of peripheral vessels |
| Echocardiography | RVH (RV free wall > 5 mm), RV dilation, septal flattening/paradoxical motion, TR with elevated RVSP, dilated RA, IVC > 21 mm with reduced collapse |
| CT chest | Underlying lung disease + PA diameter > aortic diameter (strongly suggests PH) |
| RHC | Confirmatory: elevated mPAP > 20 mmHg, normal PCWP ≤ 15 mmHg |
| BNP/NT-proBNP | Elevated; correlates with RV dysfunction severity |
| ABG | Hypoxemia, hypercapnia (in COPD-related) |
| Polycythemia | Hct elevation as compensatory response to chronic hypoxia |
Key Differentiating Points: PH vs. Cor Pulmonale
| Feature | Pulmonary Hypertension | Cor Pulmonale |
|---|---|---|
| Definition | Elevated mPAP (>20 mmHg) | RVH/dilatation from PH of pulmonary origin |
| Primary pathology | Pulmonary vasculature | Lung/thorax disease → secondary PH → RV damage |
| ECG | RVH pattern | RVH + P pulmonale |
| Echo | Elevated RVSP | RVH + RV dilation |
| Confirmatory test | RHC | Echo/RHC + underlying lung disease |
Summary Table: Diagnostic Thresholds at a Glance
| Condition | Key Diagnostic Threshold |
|---|---|
| Systemic HTN | Office BP ≥ 140/90 mmHg (×2 visits) |
| Systemic Hypotension | SBP ≤ 90–100 mmHg sustained / MAP ≥ 30 below baseline |
| Orthostatic Hypotension | SBP drop ≥ 20 mmHg or DBP drop ≥ 10 mmHg on standing |
| Pulmonary Hypertension | mPAP > 20 mmHg on RHC + PVR > 2 WU |
| Post-capillary PH (LHD) | PCWP > 15 mmHg |
| Cor Pulmonale | RVH/dilation on echo + PH from lung disease |
Sources: Harrison's Principles of Internal Medicine, 21st Ed. (p. 14908); ESC/ESH 2018 Arterial Hypertension Guidelines; ESC/ERS 2022 Pulmonary Hypertension Guidelines; Classification of Cardiogenic Shock (p. 6).
Can u give pulmonary hypotension
search_medical_text
pulmonary hypotension low pulmonary artery pressure causes diagnosis
Sickle Cell Disease: Cardiopulmonary and Kidney Disease
Page 3
GradeResponse
"Pulmonary hypotension" as a formal clinical syndrome does not exist in standard medical literature or guidelines — and this is an important clarification.
Here is why, explained clearly:
Why "Pulmonary Hypotension" Is Not a Recognized Syndrome
The Pulmonary Circulation Is Normally a Low-Pressure System
The normal pulmonary artery pressures are:
| Parameter | Normal Value |
|---|---|
| Mean pulmonary artery pressure (mPAP) | 9–20 mmHg |
| Systolic PA pressure | ~15–25 mmHg |
| Diastolic PA pressure | ~8–15 mmHg |
| Pulmonary capillary wedge pressure (PCWP) | ~6–12 mmHg |
The pulmonary circuit operates at ~1/6th the pressure of the systemic circulation. It is already a low-resistance, low-pressure circuit by design — so there is no recognized lower threshold that defines "pulmonary hypotension" the way systemic hypotension is defined.
What Happens When Pulmonary Artery Pressure Falls?
A pathologically low mPAP can occur in specific contexts, but it is always a sign of another condition, not a primary syndrome:
| Cause | Mechanism |
|---|---|
| Severe right ventricular failure | RV cannot generate enough pressure to fill the PA |
| Massive pulmonary embolism (terminal) | RV afterload overwhelm → output collapses |
| Cardiac tamponade | Reduced RV filling → reduced PA output |
| Hypovolemic/distributive shock | Reduced venous return → low PA pressures |
| End-stage cor pulmonale | RV pump failure → pressure drops terminally |
| Tetralogy of Fallot / pulmonary stenosis | Anatomical obstruction reduces PA flow |
| Pulmonary atresia | No forward flow to pulmonary artery |
In all these scenarios, the low PA pressure is a consequence of low cardiac output or obstructed flow — it is managed by treating the underlying cause, not as a standalone syndrome.
What You May Be Thinking Of
There are two related concepts sometimes confused with "pulmonary hypotension":
1. Systemic Hypotension in the Context of Pulmonary Disease
- Severe PH or cor pulmonale causing low systemic BP due to RV failure and reduced LV filling
- This is treated as cardiogenic shock
2. Low PCWP / Under-filled Pulmonary Circuit
- Seen in hypovolemia or after aggressive diuresis
- Relevant in ICU management — if PCWP drops too low (< 6 mmHg), LV preload becomes inadequate
Bottom Line
"Pulmonary hypotension" is not a recognized clinical syndrome because the pulmonary circulation is normally low-pressure. What exists instead are conditions causing reduced pulmonary blood flow or pressure — all of which are manifestations of other diagnoses (shock, RV failure, structural heart disease, hypovolemia).
If your curriculum or textbook uses this term, it likely refers to systemic hypotension secondary to pulmonary/RV pathology — which is covered under cor pulmonale and right heart failure.
Sources: ESC/ERS 2022 Pulmonary Hypertension Guidelines; Sickle Cell Disease: Cardiopulmonary and Kidney Disease (p. 3); Harrison's Principles of Internal Medicine, 21st Ed.
This is a shared conversation. Sign in to Orris to start your own chat.