A 45-year-old lady takes part in a research on cardiovascular health. Her ECG is monitored continuously for 24 hours using a wearable gadget. Her ECG revealed a few occurrences of the following pattern: Which of the following best represents the relative left ventricular end-diastolic volumes just prior to the heart beats represented by the letters?

Question

A 45-year-old lady takes part in a research on cardiovascular health. Her ECG is monitored continuously for 24 hours using a wearable gadget. Her ECG revealed a few occurrences of the following pattern:  Which of the following best represents the relative left ventricular end-diastolic volumes just prior to the heart beats represented by the letters?

Quizplus · Accepted Answer

Eductional Objective: On an ECG, a large QRS complex, an opposite-facing T wave, and a brief sinus pause signal an early ventricular contraction. When the PVC occurs, the left ventricular filling is less than normal. Following the sinus pause, the post-PVC beat might fill more fully than usual.

A 45-Year-Old Lady Takes Part in a Research on Cardiovascular