Skip to main content

MCQ 26: Pacemaker (36)

Q. A patient has been provided with a single chamber pacemaker recently for complete heart block. The pacing mode is set as VVIR. R in VVIR stands for?
A. Rate responsive
B. Rate controlled
C. Rate sensitive
D. Rate inhibition
Answer: A. Rate responsive
Explanation:

 1st letter: Chamber paced
2nd letter: Chamber sensed
3rd letter: Action of the pacemaker after sensing a beat
4th letter: Rate responsiveness i.e. demand ventricular pacing is present with response to exercise

 VVIR means: Ventricle is paced, ventricle is sensed, pacing is inhibited if beat is sensed and rate responsiveness is present in pacemaker i.e. rate of pacing is increased if a physiological need is there e.g. during exercise.
Labels:

Comments

Post a Comment

Popular posts from this blog

ECG Spotter

What is the diagnosis? Click the button below to view answer: Show Answer
Post a Comment
Read more

MCQ

 Cardiology MCQ Q. Which of the following leads is not an inferior lead in ECG? A. Lead II B. Lead III C. Lead aVF D. Lead aVR Click the button below to view answer Show answer Correct answer is option D. Lead aVR
Post a Comment
Read more

ST segment and T wave changes

What is the cause of ST changes and T wave inversions in this ECG? Should the patient be taken to Cath lab for coronary angiography? Show Answer These ST segment and T wave changes are secondary to left ventricular hypertrophy. There are classical features of left ventricular hypertrophy in this ECG which should not be missed. Hence, if the patient doesn't have any other features which suggest ischemia, then he should undergo evaluation for cause of left ventricular hypertrophy. The most common cause for left ventricular hypertrophy is hypertension.
Post a Comment
Read more