FREE Cardiographic Technician Questions and Answers

Question 1

Which of the following ions contributes most to the depolarizing current in pacemaker cells?

Accepted Answer

Calcium

Answer

In cardiac pacemaker cells, relatively sluggish, inward calcium currents are principally responsible for carrying the depolarizing current. Fast sodium currents cause the depolarization in the majority of other depolarizing cells, including muscle cells. Cellular repolarization is aided by potassium.

Question 2

Which of the following frequently reduces the utility of Holter monitoring as a diagnostic tool?

Accepted Answer

Patient noncompliance with keeping track of events

Answer

The diagnostic utility of Holter monitoring is severely constrained by patient noncompliance with using event markers and keeping a diary of their symptoms. In order to correlate occurrences with the data gathered, it is crucial for patients to note and document their symptoms. A form of continuous monitoring known as holter monitoring has advantages such as the ability to transmit data without the involvement of the patient and the vast storage capacity of the recording devices.

Question 3

Which of the following heart conditions is brought on by the parasympathetic nervous system's actions?

Accepted Answer

Decreased rate of SA node pacing

Answer

The cardiac inhibitory effects of the parasympathetic nervous system include decreased SA node pacing, decreased conduction, and lower contraction force. The sympathetic nervous system generates an increase in contraction force and rate of conduction. By stimulating the sympathetic nervous system, the heart would contract more quickly, which would shorten the diastolic filling time.

Question 4

What does the T wave on an ECG stand for?

Accepted Answer

Ventricular repolarization

Answer

The ventricles start to repolarize right after the QRS. The faster and concluding portion of the repolarization is represented by the T wave. The P wave is a visual representation of atrial depolarization. The QRS complex symbolizes the depolarization of the ventricles. On the ECG, atrial repolarization is not visible.

Question 5

What advantages do thallium stress tests have over regular ECG stress tests?

Accepted Answer

More accurately identifies the specific areas of reduced blood flow in the heart

Answer

Nuclear stress tests, sometimes referred to as thallium stress tests, collect more detailed and precise data than straightforward ECG stress testing. When attempting to gauge the degree of coronary artery disease in a patient with a history of the condition, it is a useful test.

CCT - Certified Cardiographic Technician Exam Practice Test

CCT - Certified Cardiographic Technician Exam Practice Test

FREE Cardiographic Technician Questions and Answers