KROK 1 2021 – Question 65 · KROK (Medicine) · Physiology
A man has atrioventricular block of the I degree with a prolonged PQ interval of 0.25 seconds. What cardiac ability is disturbed in this case?
- A. Conductivity
- B. Pacemaking
- C. Contractility
- D. Excitability
- E. Automatism
Hint
Consider what the PQ interval measures on the ECG, and which of the basic physiological properties of the myocardium listed in the options would be disturbed if this interval is prolonged.
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