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Explain me 10 commen heart diseases with ecg changes and ecg images of those diseases

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ECG myocardial infarction ST elevation

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atrial fibrillation ECG irregular rhythm

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heart block complete AV block ECG bradycardia

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ventricular tachycardia ECG wide complex

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Wolff-Parkinson-White syndrome ECG delta wave pre-excitation

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hypertrophic cardiomyopathy ECG left ventricular hypertrophy

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pulmonary embolism ECG S1Q3T3 right heart strain

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pericarditis ECG saddle-shaped ST elevation diffuse

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heart failure dilated cardiomyopathy ECG left bundle branch block

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Brugada syndrome ECG right bundle branch coved pattern V1 V2

Here is a comprehensive guide to 10 common heart diseases with their ECG changes and representative ECG images:

10 Common Heart Diseases — ECG Changes & Images

1. 🫀 ST-Elevation Myocardial Infarction (STEMI)

ECG Changes

PhaseFinding
HyperacuteTall, peaked (hyperacute) T-waves; may precede ST elevation by minutes
AcuteConvex (tombstone) ST elevation ≥1 mm in ≥2 contiguous leads in the territory of the occluded artery
EvolvingQ-wave formation (pathological Q > 1 mm wide or >25% of R wave); T-wave inversion
ReciprocalST depression in leads opposite the infarct zone (e.g., inferior STEMI → ST depression in I, aVL)

Territory Localization

  • LAD occlusion → ST elevation in V1–V4 (anterior/anteroseptal)
  • RCA occlusion → ST elevation in II, III, aVF (inferior)
  • LCx occlusion → ST elevation in I, aVL, V5–V6 (lateral)
Anterior STEMI — Tombstone ST elevation in V2–V5 with reciprocal changes in inferior leads

2. ❤️ Atrial Fibrillation (AF)

ECG Changes

  • Absent P waves — replaced by chaotic fibrillatory (f) waves, most visible in V1 and lead II
  • Irregularly irregular RR intervals (no two RR intervals are identical)
  • Narrow QRS complexes (unless aberrant conduction or accessory pathway is present)
  • Ventricular rate typically 100–160 bpm in uncontrolled AF (tachycardic response)
  • Fibrillatory baseline best seen as "dirty" or undulating isoelectric line
Atrial fibrillation — absent P waves, irregularly irregular rhythm, fibrillatory baseline

3. 🔴 Complete (Third-Degree) AV Heart Block

ECG Changes

  • Complete AV dissociation — P waves and QRS complexes march independently at different rates
  • Atrial rate > ventricular rate (P waves are faster)
  • No fixed PR interval — P waves bear no relationship to QRS complexes
  • Escape rhythm character depends on escape focus:
    • Junctional escape: narrow QRS ~40–60 bpm
    • Ventricular escape: wide QRS (RBBB/LBBB morphology) ~20–40 bpm
  • Prolonged QTc may be present
Complete AV block — P waves march independently, wide QRS ventricular escape ~33 bpm

4. ⚡ Ventricular Tachycardia (VT)

ECG Changes

  • Wide QRS tachycardia — QRS duration >120 ms (often >160 ms), rate 100–250 bpm
  • AV dissociation — P waves present at slower rate, unrelated to QRS (hallmark of VT)
  • Fusion beats — partial ventricular capture creating a "hybrid" QRS (diagnostic of VT)
  • Capture beats — normal narrow QRS intermittently (sinus captures ventricle briefly)
  • Concordance — all precordial leads point in same direction (positive or negative = VT)
  • Monomorphic VT: all QRS complexes are identical
  • Polymorphic VT (Torsades): sinusoidal twisting QRS axis around baseline
Monomorphic ventricular tachycardia — wide complex, regular rapid rhythm, AV dissociation

5. 💙 Wolff-Parkinson-White (WPW) Syndrome

ECG Changes

  • Short PR interval (<120 ms) — accessory pathway bypasses AV node delay
  • Delta wave — slurred, slow upstroke at the beginning of the QRS complex
  • Widened QRS (>120 ms total) due to ventricular pre-excitation
  • Secondary ST-T changes — discordant to delta wave direction
  • Pseudo-infarct pattern — negative delta waves in inferior leads can mimic Q waves
  • Pathway localization: delta wave polarity in specific leads localizes the accessory pathway
    • Negative delta in II, III, aVF → posterior/posteroseptal pathway
    • Positive delta in V1 → left lateral pathway
WPW syndrome — short PR interval, prominent delta waves in multiple leads

6. 🫁 Acute Pulmonary Embolism (PE)

ECG Changes

  • Sinus tachycardia — most common finding (>50% of cases)
  • S1Q3T3 pattern — prominent S-wave in lead I, Q-wave in lead III, T-wave inversion in lead III (right heart strain sign)
  • Right axis deviation — axis shifts rightward due to acute RV pressure overload
  • Incomplete/complete RBBB — conduction delay in the RV
  • T-wave inversions in V1–V4 — anterior RV strain
  • P pulmonale — tall peaked P waves in II (>2.5 mm) — right atrial dilation
  • Normal ECG does NOT rule out PE
Acute PE — S1Q3T3 pattern with sinus tachycardia and right heart strain

7. 🧡 Hypertrophic Cardiomyopathy (HCM)

ECG Changes

  • LVH voltage criteria — Sokolow-Lyon: S(V1) + R(V5/V6) >35 mm
  • Giant T-wave inversions (deep symmetric) in precordial leads V1–V6 — especially in apical HCM (Yamaguchi syndrome)
  • ST-segment depression — "strain pattern" in lateral leads
  • Absent septal Q waves in I, aVL, V5–V6 (reversed septal depolarization)
  • Abnormal Q waves in inferior and/or lateral leads (simulating prior MI)
  • Atrial fibrillation may develop with disease progression
HCM (apical variant) — giant T-wave inversions V2–V6, LVH voltage

8. 💚 Acute Pericarditis

ECG Changes (4 Classic Stages)

StageFinding
Stage IDiffuse concave (saddle-shaped) ST elevation in all leads except aVR and V1; PR depression in same leads; PR elevation in aVR
Stage IIST returns to baseline; T waves flatten
Stage IIIDiffuse T-wave inversions
Stage IVNormalization (may take weeks)
  • Spodick's sign — downsloping TP segment in multiple leads
  • No reciprocal ST depression (unlike STEMI) — helps differentiate from MI
  • No Q waves (no myocardial necrosis)
Acute pericarditis — diffuse saddle-shaped ST elevation, PR depression, PR elevation in aVR

9. 🩵 Dilated Cardiomyopathy (DCM) / Heart Failure

ECG Changes

  • Left Bundle Branch Block (LBBB) — most characteristic; wide QRS >120 ms, broad monophasic R in I, aVL, V5–V6; deep QS in V1–V3
  • First-degree AV block — prolonged PR interval (>200 ms)
  • Poor R-wave progression in precordial leads (simulates anterior MI)
  • Left axis deviation
  • Non-specific ST-T changes — secondary repolarization abnormalities
  • Atrial fibrillation — common in advanced DCM
  • Ventricular ectopy / NSVT — reflects myocardial remodeling
Dilated cardiomyopathy — LBBB with first-degree AV block, wide QRS 145 ms

10. 🟣 Brugada Syndrome

ECG Changes

  • Type 1 (Diagnostic) — "Coved" ST elevation ≥2 mm in V1–V2, with a downward convex slope into inverted T-wave with no isoelectric separation (pathognomonic)
  • Type 2 ("Saddle-back") — ST elevation ≥2 mm but with a positive/biphasic T-wave — not diagnostic alone
  • Pseudo-RBBB pattern — rSr' in V1–V2 mimicking RBBB
  • Pattern may be concealed (only appears after sodium channel blockers: ajmaline, flecainide, procainamide challenge)
  • Associated with ventricular fibrillation and sudden cardiac death, especially at rest/sleep
  • SCN5A gene mutation (cardiac sodium channel) in ~25% of cases
Brugada syndrome Type 1 — classic coved ST elevation V1–V2, inverted T-wave

Quick Reference Summary Table

#DiseaseKey ECG Feature
1STEMIConvex ST elevation + reciprocal changes + Q waves
2Atrial FibrillationNo P waves, irregularly irregular RR
3Complete Heart BlockP-QRS dissociation, escape rhythm
4Ventricular TachycardiaWide QRS, AV dissociation, fusion beats
5WPW SyndromeShort PR, delta wave, wide QRS
6Pulmonary EmbolismS1Q3T3, sinus tachycardia, RBBB pattern
7Hypertrophic CardiomyopathyLVH voltage, giant T-wave inversions
8Acute PericarditisDiffuse concave ST elevation, PR depression
9Dilated CardiomyopathyLBBB, poor R progression, AF
10Brugada SyndromeCoved ST elevation V1–V2, pseudo-RBBB
Sources: Braunwald's Heart Disease (9th/12th ed.), Rosen's Emergency Medicine — ECG interpretation sections; ECG images from peer-reviewed clinical literature (PMC).

All understood in gujrati

૧૦ સામાન્ય હૃદય રોગો — ECG ફેરફારો અને ચિત્રો સાથે

૧. 🫀 ST-એલિવેશન મ્યોકાર્ડિયલ ઇન્ફાર્ક્શન (STEMI) — હૃદયનો હુમલો

ECG ફેરફારો

તબક્કોફેરફાર
તીવ્ર શરૂઆતઊંચા, નુકીળા T-waves (hyperacute T)
તીવ્ર તબક્કોST elevation — ઉપર ઊઠેલું ST segment (ટોમ્બસ્ટોન આકાર)
વિકસતો તબક્કોQ-wave બને — હૃદયના સ્નાયુ મૃત્યુની નિશાની; T-wave ઊંધું થાય
સામેની બાજુReciprocal ST depression — વિરુદ્ધ leads માં ST નીચે જાય

કઈ ધમની બંધ — ક્યાં ફેરફાર

  • LAD (આગળની ધમની) → V1–V4 માં ST elevation
  • RCA (નીચેની ધમની) → II, III, aVF માં ST elevation
  • LCx (બાજુની ધમની) → I, aVL, V5–V6 માં ST elevation
STEMI — V2–V5 માં ટોમ્બસ્ટોન ST elevation

૨. ❤️ એટ્રિયલ ફિબ્રિલેશન (AF) — હૃદયની ઉપરની ચેમ્બરની ધ્રૂજારી

ECG ફેરફારો

  • P-wave ગાયબ — નિયમિત P-waves દેખાતા નથી; ની જગ્યાએ ધ્રૂજતી (fibrillatory) baseline
  • અનિયમિત-અનિયમિત RR અંતર — દરેક ધબકારો અલગ-અલગ સમયે
  • સાંકડા QRS complexes (સામાન્ય)
  • હૃદયના ધબકારા ઝડપી: ૧૦૦–૧૬૦ per minute (uncontrolled)
  • V1 lead માં "ગંદી" baseline સ્પષ્ટ દેખાય
AF — P-waves ગાયબ, અનિયમિત rhythm

૩. 🔴 સંપૂર્ણ AV હાર્ટ બ્લોક (Third-Degree Heart Block)

ECG ફેરફારો

  • P-wave અને QRS સ્વતંત્ર — બંને અલગ-અલગ ગતિથી ચાલે, કોઈ સંબંધ નહીં
  • Atrial rate > Ventricular rate — P-waves ઝડપી, QRS ધીમા
  • PR interval સ્થિર નહીં — P અને QRS વચ્ચેનું અંતર બદલાતું રહે
  • Escape rhythm:
    • Junctional: સાંકડો QRS ~40–60 bpm
    • Ventricular: પહોળો QRS ~20–40 bpm
  • QTc interval લંબાઈ શકે
Complete AV Block — P-QRS dissociation, ventricular escape rhythm ~33 bpm

૪. ⚡ વેન્ટ્રિક્યુલર ટેકિકાર્ડિયા (VT)

ECG ફેરફારો

  • પહોળો QRS — QRS >120 ms (ઘણીવાર >160 ms); ઝડપ 100–250 bpm
  • AV dissociation — P-waves ધીમા, QRS ઝડપા, કોઈ સંબંધ નહીં (VT ની સૌથી ચોક્કસ નિશાની)
  • Fusion beats — સામાન્ય + VT QRS ભળે (VT સાબિત કરે)
  • Capture beats — સાઇનસ rhythm ક્ષણ માટે ventricle ને capture કરે
  • Concordance — બધી chest leads એક જ દિશામાં (ઉપર/નીચે)
  • Monomorphic VT: દરેક QRS સરખો
  • Polymorphic VT (Torsades): QRS dhuri ફરે
Monomorphic VT — wide complex tachycardia, AV dissociation

૫. 💙 વુલ્ફ-પાર્કિન્સન-વ્હાઇટ સિન્ડ્રોમ (WPW)

ECG ફેરફારો

  • ટૂંકો PR interval (<120 ms) — accessory pathway AV node ને bypass કરે
  • Delta wave — QRS ના શરૂઆતમાં ધીમો, slurred ઉભાર (ચોક્કસ નિશાની)
  • પહોળો QRS (>120 ms) — early ventricular activation ના કારણે
  • ST-T ફેરફારો — secondary, delta wave ની વિરુદ્ધ દિશામાં
  • Pseudo-infarct — inferior leads માં negative delta waves MI જેવા Q-wave બનાવે
  • Delta wave ની polarity pathway ની location બતાવે
WPW Syndrome — ટૂંકો PR, delta waves સ્પષ્ટ

૬. 🫁 તીવ્ર પલ્મોનરી એમ્બોલિઝમ (PE) — ફેફસાની ધમની બ્લોક

ECG ફેરફારો

  • Sinus tachycardia — સૌથી સામાન્ય (>50% cases)
  • S1Q3T3 pattern — Lead I માં deep S-wave + Lead III માં Q-wave + Lead III માં inverted T-wave (જમણા હૃદય પર ભાર)
  • Right axis deviation — axis જમણી બાજુ
  • Incomplete/complete RBBB — RV conduction delay
  • V1–V4 માં T-wave inversion — anterior RV strain
  • P pulmonale — lead II માં ઊંચા P-waves (right atrium ફૂલ્યો)
  • ⚠️ Normal ECG PE ને નકારી ન શકે
Acute PE — S1Q3T3 pattern, sinus tachycardia

૭. 🧡 હાઇપરટ્રોફિક કાર્ડિઓમાયોપથી (HCM) — જાડું હૃદય

ECG ફેરફારો

  • LVH voltage — Sokolow-Lyon: S(V1) + R(V5/V6) >35 mm
  • Giant T-wave inversions — ઊંડા, symmetric inverted T-waves V1–V6 (ખાસ કરીને apical HCM / Yamaguchi syndrome)
  • ST depression — lateral leads માં "strain pattern"
  • Absent septal Q waves — I, aVL, V5–V6 માં septal Q-waves ગાયબ
  • Abnormal Q waves — inferior/lateral leads — MI ની નકલ
  • AF: રોગ વધતા atrial fibrillation થઈ શકે
HCM (apical) — V2–V6 માં giant T-wave inversions

૮. 💚 તીવ્ર પેરિકાર્ડિટિસ — હૃદયના આવરણની સોજ

ECG ફેરફારો — ૪ ક્લાસિક તબક્કા

તબક્કોફેરફાર
Stage IDiffuse concave (saddle-shaped) ST elevation — aVR અને V1 સિવાય બધા leads; PR depression (inflammatory signature); aVR માં PR elevation
Stage IIST baseline પર આવે; T-waves flat થાય
Stage IIIDiffuse T-wave inversions
Stage IVNormalization (અઠવાડિયા લાગે)
  • Spodick's sign — TP segment નીચે ઢળે
  • Reciprocal ST depression નહીં — STEMI થી અલગ
  • Q-waves નહીં — myocardium નષ્ટ નથી
Acute Pericarditis — diffuse saddle ST elevation, PR depression, PR elevation in aVR

૯. 🩵 ડાઇલેટેડ કાર્ડિઓમાયોપથી (DCM) / હૃદય નિષ્ફળતા

ECG ફેરફારો

  • Left Bundle Branch Block (LBBB) — સૌથી ખાસ; QRS >120 ms; I, aVL, V5–V6 માં broad monophasic R; V1–V3 માં deep QS
  • First-degree AV block — PR interval >200 ms
  • Poor R-wave progression — precordial leads માં — anterior MI ની નકલ
  • Left axis deviation
  • Non-specific ST-T changes — secondary repolarization abnormalities
  • Atrial fibrillation — advanced DCM માં
  • Ventricular ectopy / NSVT — myocardial remodeling ની નિશાની
DCM — LBBB, first-degree AV block, QRS 145 ms

૧૦. 🟣 બ્રુગાડા સિન્ડ્રોમ — આનુવંશિક વીજળી ખામી

ECG ફેરફારો

  • Type 1 (Diagnostic — "Coved type") — V1–V2 માં ≥2 mm ST elevation; ઉપરથી નીચે convex ઢળણ → inverted T-wave (isoelectric gap નહીં) — pathognomonic
  • Type 2 ("Saddle-back") — ST elevation ≥2 mm પણ T-wave positive/biphasic — એકલું diagnostic નહીં
  • Pseudo-RBBB — V1–V2 માં rSr' pattern
  • Pattern concealed રહી શકે — sodium channel blockers (ajmaline/flecainide) થી unmask
  • Ventricular fibrillation અને sudden cardiac death નો ભય — ખાસ ઊંઘ/આરામ દરમ્યાન
  • SCN5A gene mutation — ~25% cases
Brugada Type 1 — V1–V2 માં classic coved ST elevation, inverted T-wave

⚡ ઝડપી સંદર્ભ કોષ્ટક

#રોગECG ની ખાસ નિશાની
૧STEMIConvex ST elevation + Q-waves + Reciprocal changes
૨Atrial FibrillationP-waves ગાયબ, અનિયમિત-અનિયમિત RR
૩Complete Heart BlockP-QRS dissociation, escape rhythm
૪Ventricular TachycardiaWide QRS, AV dissociation, fusion beats
૫WPW SyndromeShort PR, Delta wave, Wide QRS
૬Pulmonary EmbolismS1Q3T3, Sinus tachycardia, RBBB pattern
૭Hypertrophic CardiomyopathyLVH voltage, Giant T-wave inversions
૮Acute PericarditisDiffuse concave ST elevation, PR depression
૯Dilated CardiomyopathyLBBB, Poor R progression, AF
૧૦Brugada SyndromeCoved ST elevation V1–V2, Pseudo-RBBB
સ્ત્રોત: Braunwald's Heart Disease, Rosen's Emergency Medicine — ECG વિભાગ; ECG ચિત્રો peer-reviewed clinical literature (PMC) માંથી.
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