Ischemic Heart Disease and Conduction Disorders

These flashcards cover key vocabulary and concepts from the lecture on Ischemic Heart Disease and Conduction Disorders.

Epicardium

The outer layer of the heart wall.

Myocardium

The muscular middle layer of the heart wall responsible for contractions.

Endocardium

The inner layer of the heart that lines the chambers.

Right atrium

One of the four chambers of the heart that receives deoxygenated blood.

Tricuspid valve (TV)

The valve located between the right atrium and right ventricle.

Pulmonary arteries

Vessels that carry deoxygenated blood from the right ventricle to the lungs.

Systolic pressure

The pressure in the arteries during the contraction of the heart.

Diastolic pressure

The pressure in the arteries when the heart is at rest.

Sinoatrial node (SA node)

The heart's natural pacemaker located in the right atrium.

Cardiac Action Potential

An electrical impulse that triggers heart muscle contraction.

Electrocardiogram (ECG)

A test that measures the electrical activity of the heart.

P wave

Represents atrial depolarization on an ECG.

QRS complex

Represents ventricular depolarization on an ECG.

T wave

Represents ventricular repolarization on an ECG.

Coronary arteries

Arteries that supply blood to the heart muscle.

Pacemaker

An area in the heart that regulates heartbeats.

Resting membrane potential

The electrical potential difference across the membrane of a resting cell.

Repolarization

The process of the heart muscles returning to their resting state after contraction.