lecture recording on 12 November 2025 at 09.46.51 AM

Contract Contraction Phase

• Definition of cardiac cycle

  • Diastole is longer than systole

  • Systolic phase is a relatively short contraction phase

Wigger's Diagram

• Wigger's diagram contains key elements related to the cardiac cycle

  • Illustrates timing and events happening during the cardiac cycle

Electrical Components of the Cardiac Cycle (ECG)

• Overview of ECG Waves: P, QRS, T waves

  • P wave: Represents atrial depolarization and leads to atrial contraction

  • Atrial pressure increases during the P wave, indicating contraction

  • Blood flows from the atria into the ventricles, resulting in increased ventricular volume

  • QRS Complex: Represents ventricular depolarization
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