Exam 14: The Heart

An automatic external defibrillator requires training as an EMT or a paramedic for it to be effective.

The structures of the heart cells called the intercalated disks make the conduction of impulses through the heart much more efficient.

Match each structure in the heart with its corresponding description or function. -blood vessel that blood from the left ventricle enters after passing through a valve

Stroke volume is usually larger than cardiac output.

Both the superior and inferior venae cavae enter the left atrium of the heart.

A premature contraction can be seen on an electrocardiogram as a longer than normal time between the T wave and the next P wave.

Which of the following is not a cause of heart failure?

Because the atria set the pace for the heartbeat,atrial fibrillation is much more life threatening than ventricular fibrillation.

Explain how the location of the heart allows for cardiopulmonary resuscitation.

The cardiac output is always larger than the stroke volume.

Define or explain bradycardia,tachycardia,and sinus dysrhythmia.

What is congestive heart failure and what is pulmonary edema?

An embolism in the coronary arteries can lead to a myocardial infarction.

A mitral valve prolapse might cause an unusual first sound of the heart.

If damage to the heart caused an unusual deflection of the P wave,the damage probably occurred in one of the atria of the heart.

Blood returning from the lung enters which heart chamber?

Match each structure in the heart with its corresponding description or function. -heart chamber that blood enters after passing through the tricuspid valve

A person with bradycardia has more QRS complexes per minute on an electrocardiogram than a person with tachycardia.

Fibrillation occurs when the heart muscles lose coordination and beat out of step with each other.

Another name for the parietal pericardium is the epicardium.