Cardiology Quiz

What is the characteristic unique to cardiac muscle?

• Automaticity

• Conductivity

• Excitability

• Contractility

What does an electrocardiograph machine measure and record?

• Electrical activity in the heart

• Blood pressure

• Oxygen levels

• Brain activity

Which enzyme is considered a sensitive and specific marker for myocardial infarction?

• Troponin

• CK

• AST

• Myoglobin

What is the normal value for Troponin T?

• 0–0.1μg/L

• Less than 10μg/L

• 0.1–1μg/L

• 10–20μg/L

What is the effect of Beta Blockers during exercise?

• Increased arrhythmias

• Increased blood pressure

• Decreased heart rate

• Increased exercise capacity

What is the mechanism of action of Calcium Channel Blockers?

• Inhibit calcium influx

• Decrease blood pressure

• Increase heart rate

• Increase ischemia

Which medication improves myocardial contraction by altering calcium utilization?

• Triamterene

• Furosemide

• Diltiazem

• Digoxin

What is the main effect of Diuretics at rest?

• Increase blood pressure

• Decrease blood pressure

• Increase arrhythmias

• Decrease heart rate

What do maximal exercise tests measure or predict?

• Brain activity

• Lung capacity

• Blood sugar levels

• Maximum oxygen consumption

What is the normal duration of the P-R interval in an ECG?

• 0.05-0.10 seconds

• 0.30-0.40 seconds

• 0.12-0.20 seconds

• 0.25-0.30 seconds