Medical Therapeutics Electrocardiogram

The two upper chambers of the heart are called:

• atria

• ventricles

The ventricles are the two lower chambers of the heart.

• True

• False

The atrioventricular node (AV node) is the pacemaker of the heart.

• true

• false

The pacemaker of the heart is called the:

• sinoatrial node

• atrioventricular node

specialized muscle fibers that conduct electrical impulses from the av node to the ventricular myocardium

• purkinje fibers

• bundle of His

Blood pressure reflects the contraction and relaxation of the heart.

• False

• True

During ___________, the heart contracts. Blood is pumped from the heart to the lungs and out to the remainder of the body.

• systole

• diastole

During ___________, the chambers of the heart relax, and blood enters the heart from the vascular system and lungs.

• diastole

• systole

Decreased blood flow to a body part or organ causing a constriction or blockage of the artery that supplies blood:

• ischemia

• myocardial infarction

death of myocardial cells due to prolonged ischemia or lack of blood

• myocardial ischemia

• myocardial infarction