Why is a prolonged QT interval associated with life-threatening heart rhythm disturbances?
A) It is associated with a longer vulnerable period.
B) Calcium influx is the greatest during this period.
C) The SA node becomes refractory to the normal depolarization.
D) This period is refractory to AV depolarization.
Correct Answer:
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Q1: How long does it normally take for
Q2: Which of the following are features of
Q4: What is the normal MCV angle?
A) +30
Q5: Which of the following limb leads are
Q6: Atrial depolarization is represented by which of
Q7: Which of the following conditions are detected
Q8: When the heart rate is 150 beats/min,
Q9: The normal MCV is parallel to which
Q10: In which direction does ventricular depolarization normally
Q11: Which of the following are characteristics of
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