Question: Which of the following represents a correct sequence of events in a cardiac cycle?
A Ventricular systole → atrial systole →joint diastole → ventricular diastole
B Ventricular systole → atrial diastole →joint diastole → ventricular diastole
C Joint diastole → ventricular systole → atrial systole → ventricular diastole
D Joint diastole → atrial systole → ventricular systole →ventricular diastole → joint diastole
Answer: Joint diastole → atrial systole → ventricular systole →ventricular diastole → joint diastole
| Aspect | Description |
| Introduction | · Complete sequence of events that occur in the heart during one heartbeat, including both systole (contraction) and diastole (relaxation) phases. |
| Number of Heartbeats | · In a normal, healthy adult, normal rate of heart beat is about 60 to 100 times per minute. |
| Cardiac Cycle Measurement Instrument | · Electrocardiography (ECG or EKG) · Echocardiography · Invasive methods like cardiac catheterization |
| Cardiac Cycle Sequence | · Joint diastole → atrial systole → ventricular systole →ventricular diastole → joint diastole |
| Cardiac cycle waves | · P Wave: Represents atrial depolarization (contraction). · QRS Complex: Represents ventricular depolarization (contraction). · T Wave: Represents ventricular repolarization (relaxation). · ST Segment: Indicates the period when the ventricles are contracting but not repolarizing. · QT Interval: Represents the time from ventricular depolarization to repolarization. |