Free RCIS Cardiovascular Anatomy and Physiology Questions and Answers

Question 1

The inferior wall of the left ventricle is primarily supplied by which coronary artery?

Accepted Answer

Right Coronary Artery (RCA)

Answer

Left Anterior Descending (LAD) artery

Answer

Left Circumflex (LCx) artery

Answer

Left Main (LM) coronary artery

Question 2

What is the intrinsic firing rate of the atrioventricular (AV) node when it acts as the primary pacemaker?

Accepted Answer

40-60 beats per minute

Answer

60-100 beats per minute

Answer

20-40 beats per minute

Answer

100-120 beats per minute

Question 3

In a patient with severe aortic stenosis, what pressure gradient finding is expected during a left heart catheterization?

Accepted Answer

Peak systolic LV pressure is significantly higher than peak systolic Ao pressure

Answer

Peak systolic LV pressure is lower than peak systolic Ao pressure

Answer

LV end-diastolic pressure is equal to pulmonary capillary wedge pressure

Answer

Right atrial pressure is elevated

Question 4

The Frank-Starling mechanism of the heart describes the relationship between:

Accepted Answer

Preload and stroke volume

Answer

Heart rate and cardiac output

Answer

Afterload and ventricular wall stress

Answer

Coronary blood flow and myocardial oxygen demand

Question 5

During a right heart catheterization for an atrial septal defect (ASD), the most significant oxygen saturation 'step-up' would be found between which two chambers?

Accepted Answer

Superior Vena Cava and Right Atrium

Answer

Right Atrium and Right Ventricle

Answer

Right Ventricle and Pulmonary Artery

Answer

Pulmonary Artery and Left Atrium

Question 6

Which component of the cardiac cycle is represented by the T-wave on an electrocardiogram (ECG)?

Accepted Answer

Ventricular repolarization

Answer

Atrial depolarization

Answer

Ventricular depolarization

Answer

Atrial repolarization