HeartSync - The Lub-Dub Life

02/15/2026

DIFFERENT TYPES OF PREMATURE ATRIAL CONTRACTION(PAC)
*Quadrigeminy PAC* repeating pattern of three normal beats followed by one PAC
*ECG (EKG) Characteristics*

Rhythm pattern: Regularly irregular

PAC timing: Early beat every 4th complex

PR interval: Differ on PAC beat

02/15/2026

Regular Vs Irregular

02/14/2026

DIFFERENT TYPES OF PREMATURE ATRIAL CONTRACTION(PAC)
*Trigeminy PAC*(Atrial Trigeminy)every third heartbeat is a premature atrial contraction (PAC).

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*Bigeminy PAC* Occurs after every normal beat.
=>Normal beat → PAC → Normal beat → PAC →
=>PAC after every normal beat

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=>PREMATURE JUNCTIONAL CONTRACTION (PJCs)

*P Wave: Inverted, hidden, or absent*

*QRS Complex: normal (narrow)*

02/14/2026

Different Types of Junctional Rhythm
4. PREMATURE JUNCTIONAL COMPLEX (PJCs)
early, extra heartbeat originating from the heart's AV (atrioventricular)
*Key ECG Characteristics*
- Timing: Complex appears earlier than the next expected sinus beat.
- P Wave (Retrograde): often inverted ,Before the QRS (not visible), After the QRS.
- QRS Complex: Typically narrow

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02/05/2026

*ATRIAL FLUTTER*
Heart rhythm disorder characterized by the atria beating too fast.
*ECG Features*

- Rhythm: Usually regular

- P waves: Not normal

- ECG Pattern: Flutter waves (F waves),distinct Sawtooth pattern

- Best seen in leads II, III, aVF