The rate of sinus tachycardia is

An ECG rhythm strip shows a ventricular rate of 46 beats/min, a regular rhythm, a PR interval of 0.14 second, a QRS duration of 0.06 second, and one upright P wave before each QRS. This rhythm is

An ECG rhythm strip shows a ventricular rate of 128 beats/min, a regular rhythm, a PR interval of 0.16 second, a QRS duration of 0.08 second, and one upright P wave before each QRS. This rhythm is sinus

Rate of sinus rhythm is

Rate of sinus bradycardia is

How PACs are usually managed?

Upon conversion of atrial fibrillation to sinus rhythm, the patient should be observed for signs of a possible stroke

A beat originating from the AV junction that appears later than the next expected sinus beat is called a

Common causes of junctional dyshythmias may include acute coronary syndromes and

Wich of the following medications increases heart rate by accelerating the SA node discharge rate and blocking the vagus nerve?

What is the function of the right atrium?

Which is a branch of the left coronary artery

A conduction problem above the level of the bundle branches will largely affect the P wave and PR interval.

The apex of the heart is formed by the

The left atrium receives blood from the

Blood pressure is determined by——— and multipled by————

The right atrium receives venous blood from the head, neck, and thorax via the ——-remainder of the body via the ——, and from the heart via the ——

The intrinsic rate of the atrioventricular (AV) bundle is beats/min _

——- is the ability of cardiac pacemaker cells to spontaneously initiate an electrical impulse without being stimulated from another source, such as a nerve.

The normal pacemaker of the heart is the—- node, which is found in the ——-atrium, and has an intrinsic firing rate of ———beats/min.

On an ECG, what is the first negative deflection seen after the P wave?

If the wave of depolarization (electrical impulse) moves toward the positive electrode, the waveform recorded on ECG graph paper will be upright (positive deflection).

On the ECG, the T wave represents

The thick, muscular middle layer of the heart wall that contains the atrial and ventricular muscle fibers necessary for contraction is the

Blood flows from the right atrium through the——- valve into the right ventricle.

Which of the following are semilunar valves?

Multifocal atrial tachycardia is another name for atrial fibrillation.

A junctional escape rhythm occurs because of _

The usual rate of nonparoxysmal junctional tachycardia is ——beats/min

The atrioventricular (AV) junction consists of the

If seen, the P wave of a rhythm originating in the AV junction will appear. ___ in lead Il.

Which of the following may cause a sinus bradycardia?

Which of the following correctly describes multifocal atrial tachycardia?

The most common type of supraventricular tachycardia (SVT) is

Which of the following are possible causes of sinus tachycardia?

Leads I, aVL, V5, and V6 view the _ surface of the left ventricle.

The absolute refractory period begins with the onset of the —— and terminates ——-

The QT interval is measured from the beginning of the——

In an adult, the normal duration of the QRS complex is——

The intrinsic rate of the Purkinje fibers is _ beats/min.

The intrinsic rate of the SA node is —- beats/min.

On the ECG, the time necessary for the spread of an electrical impulse through the AV node, bundle of His, right and left bundle branches, and the Purkinje fibers is reflected by the ——-