Exam 28: Heart

The base of the heart lies on the diaphragm.

Epicardium and fibrous pericardium are two names for the same structure.

The period between the closure of the semilunar valve and the opening of the atrioventricular valves is called:

In electrocardiography, only the contraction of the cardiac muscle causes a deflection.

COPD refers to death of ischemic heart muscle cells.

The terms subendocardial fibers and Purkinje fibers refer to the same structures.

The trabeculae carneae are structures of the heart that help add force to the contraction of the heart.

The normal rhythm of the heart is set by the ectopic pacemaker.

Which of the following is not true of ventricles?

The P wave is named as such because it measures a positive deflection in the ECG.

The terms AV bundles and Purkinje fibers refer to the same structures.

Blood passing through the mitral valve has just left the right atrium.

Atrioventricular valves prevent backflow of blood into the:

On an ECG, the T wave represents:

The correct order of the layers of the heart from deep to superficial is:

Draw a normal ECG. Identify the physiological activity within the heart during each ECG deflection and interval.

Respectively, the right and left atrioventricular valves are also known as:

Anastomoses are important for providing collateral circulation.

Which part of the QRS complex represents the repolarization of the atria?

Match each ECG wave or complex with the corresponding action in the cardiac cycle. -Late repolarization of the Purkinje fibers, larger with hypokalemia