Exam 2: Electrophysiology

If the PR interval is 0.10 secs,the time it takes for the impulse to travel from the atrium down to the ventricle is abnormal.

The normal ST segment is

The electrical impulse travels through the ________ to get from the atrium to the AV node.

Phase 0 of the action potential corresponds with what wave or complex on the EKG?

Which of the following characteristics of heart cells is mechanical?

The PR interval would be considered abnormal if it measured ________ small blocks on the EKG paper.

What electrical event must occur for atrial contraction to occur?

The T wave represents

Normal conduction begins with the pacemaker of the heart,the ________.

The normal pacemaker of the heart is the AV node.

Cardiac cell stimulus during the absolute refractory period often results in very fast,dangerous rhythms.

The job of the cardiac conduction system is to

The cardiac cell,at rest,has a transmembrane potential of +20 mV.

The EKG is a recording of the

The normal rate of the sinus node is 60-100 beats per minute.

The normal inherent rate of the sinus node as a pacemaker is

The baseline on the EKG strip is considered to be the

Contractility is the ability of a cardiac cell to

One small block on the EKG paper measures ________ seconds.

The ST segment is a flat line from which the waves and complexes take off.