DC Medical Terminology & Anatomy 3

Question 1

The term 'ectopic' in cardiac physiology describes an impulse that originates:

Accepted Answer

Outside the normal conduction pathway

Answer

An ectopic beat originates from a site other than the SA node, outside the normal pacemaker pathway.

Question 2

Which term describes the period during which cardiac cells cannot respond to a new stimulus regardless of its strength?

Accepted Answer

Absolute refractory period

Answer

During the absolute refractory period, cells are completely unable to depolarize in response to any stimulus.

Question 3

The atrioventricular (AV) node is located in the:

Accepted Answer

Right atrium near the tricuspid valve

Answer

The AV node lies in the floor of the right atrium near the tricuspid valve and the interatrial septum.

Question 4

The suffix '-cardia' in medical terminology refers to:

Accepted Answer

Heart condition

Answer

The suffix '-cardia' means a condition of the heart, derived from the Greek 'kardia.'

Question 5

Depolarization of the ventricular muscle is represented on the ECG by the:

Accepted Answer

QRS complex

Answer

The QRS complex represents rapid depolarization of the ventricular myocardium.

(DC) Dysrhythmia Certification Practice Test