Cardiovascular disease pharmacology - To understand and explain the basics of heart physiology

4 important questions on Cardiovascular disease pharmacology - To understand and explain the basics of heart physiology

What are the main chambers of the heart?

Two atria (upper chambers) and two ventricles (lower chambers).

What is the difference between systole and diastole?

Systole is the contraction phase of the heart, pumping blood out; diastole is the relaxation phase, filling the heart with blood

Which nodes control the electrical conduction of the heart?

SA node (sinoatrial) initiates heartbeat, AV node (atrioventricular) delays impulse, Purkinje fibers distribute impulse to ventricles.
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How does the heart regulate blood pressure?

Through cardiac output (heart rate × stroke volume) and vascular resistance.

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