Question 358 · LEK · Cardiac arrhythmias and conduction disorders
Indicate true statement(s) regarding pre-excitation syndromes:
1) a pre-excitation syndrome is a premature activation of the ventricles through an accessory pathway connecting the atrium and ventricle;
2) WPW (Wolff-Parkinson-White) syndrome features prolonged PR interval and QRS complex widened by the delta wave;
3) LGL (Lown-Ganong-Levine) syndrome features shortened PR interval and QRS complex widened by the delta wave;
4) digoxin is the medication of choice in the treatment of WPW syndrome;
5) clinical symptoms of pre-excitation syndromes occur during bradycardia;
6) from around the age of 5, ablation of the abnormal conduction pathway is a possible management option.
The correct answer is:
2) WPW (Wolff-Parkinson-White) syndrome features prolonged PR interval and QRS complex widened by the delta wave;
3) LGL (Lown-Ganong-Levine) syndrome features shortened PR interval and QRS complex widened by the delta wave;
4) digoxin is the medication of choice in the treatment of WPW syndrome;
5) clinical symptoms of pre-excitation syndromes occur during bradycardia;
6) from around the age of 5, ablation of the abnormal conduction pathway is a possible management option.
The correct answer is:
- A. only 1.
- B. 1, 6.
- C. 1, 2, 3, 6.
- D. all of the above.
- E. none of the above.
Hint
Recall the ECG features of WPW (PR interval, delta wave), how LGL differs, which drugs are dangerous and when symptoms appear.
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