EMT-B

The inside diameter of an artery or other hollow structure.

Slow heart rate, less than 60 beats/min.

The part of the body, or any body part, nearer to the head.

A lack of oxygen that deprives tissues of necessary nutrients, resulting from partial or complete blockage of blood flow; potentially reversible because permanent injury has not yet occurred.

The main artery, which receives blood from the left ventricle and delivers it to all the other arteries that carry blood to the tissues of the body.

An irregular or abnormal heart rhythm.

Swelling in the part of the body closest to the ground, caused by collection of fluid in the tissues; a possible sign of congestive heart failure (CHF).

Heart attack; death of heart muscle following obstruction of blood flow to it. Acute in this context means "new" or "happening right now."

Fainting spell or transient loss of consciousness.

Rapid heart rhythm in which the electrical impulse begins in the ventricle (instead of the atrium), which may result in inadequate blood flow and eventually deteriorate into cardiac arrest.

Heart muscle.

A blood vessel that carries blood and nutrients to the heart muscle.

Transient (short-lived) chest discomfort caused by partial or temporary blockage of blood flow to the heart muscle.

Widening of a tubular structure such as a coronary artery.

A disorder in which cholesterol and calcium build up inside the walls of blood vessels, eventually leading to partial or complete blockage of blood flow.

Death of a body tissue, usually caused by interruption of its blood supply.

A state in which the heart fails to generate an effective and detectable blood flow; pulses are not palpable in cardiac arrest, even if muscular and electrical activity continues in the heart.

A disorder in which the heart loses part of its ability to effectively pump blood, usually as a result of damage to the heart muscle and usually resulting in a backup of fluid into the lungs.

A state in which not enough oxygen is delivered to the tissues of the body, caused by low output of blood from the heart. It can be a severe complication of a large acute myocardial infarction, as well as other conditions.

One of two (right and left) upper chambers of the heart. The right atrium receives blood from the vena cava and delivers it to the right ventricle. The left atrium receives blood from pulmonary veins and delivers it to the left ventricle.

One of two (right and left) lower chambers of the heart. The left ventricle receives blood from the left atrium (upper chamber) and delivers blood to the aorta. The right ventricle receives blood from the right atrium and pumps it into the pulmonary artery.

The flow of blood through body tissues and vessels.

Blockage, usually of a tubular structure such as a blood vessel.

To shock a fibrillating (chaotically beating) heart with specialized electrical current in an attempt to restore a normal rhythmic beat.

Rapid heart rhythm, more than 100 beats/min.