CCT Cardiac Diagnostic Testing & Equipment Flashcards
6 cards from real CCT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CCT Cardiac Diagnostic Testing & Equipment flashcards as text
During a stress echocardiogram, new wall motion abnormalities during exercise indicate:
Answer: Myocardial ischemia in the affected territory
New regional wall motion abnormalities that appear during exercise stress echo indicate inadequate blood supply to that myocardial segment, consistent with ischemia.
Which cardiac biomarker is the most specific and sensitive indicator of myocardial injury?
Answer: Troponin I or T
Cardiac troponins (I and T) are highly specific to myocardial tissue and rise within 2–4 hours of injury, remaining elevated for up to 14 days.
An echocardiogram reports an ejection fraction (EF) of 35%. This finding is consistent with:
Answer: Reduced ejection fraction heart failure (HFrEF)
A normal ejection fraction is 55–70%; an EF of 35% indicates severely reduced ventricular systolic function, classified as HFrEF.
During cardiac catheterization, a pressure gradient of 50 mmHg across the aortic valve indicates:
Answer: Severe aortic stenosis
A peak-to-peak or mean gradient greater than 40–50 mmHg across the aortic valve during catheterization is diagnostic of severe aortic stenosis.
The P-R interval on a 12-lead ECG represents:
Answer: Time for impulse conduction from atria through the AV node to ventricles
The PR interval measures the total time from atrial depolarization (P wave onset) through AV nodal delay to the start of ventricular depolarization.
A Holter monitor is best used to detect:
Answer: Intermittent arrhythmias not captured on a routine 12-lead ECG
Holter monitors provide 24–48 hours of continuous ECG recording, making them ideal for correlating symptoms with transient arrhythmias in ambulatory patients.