Cardiology MCQ 50

Q. A 25-year old woman has presented to the clinic for assessment. She has a past medical history of palpitations and is suspected to have congenital long QT syndrome from evidence of her ECG findings. Which one of these drugs should be avoided?
A. Amoxycillin
B. Thyroxine
C. Sertraline
D. Paracetamol

Answer: C- Sertraline

Explanation:Common drugs which cause long QT syndrome are:

Tricyclic antidepressants (e.g.sertraline)

Antiarrhythmics:

Quinidine
Disopyramide
Procainamide
Amiodarone
Sotalol

Antipsychotics: Haloperidol and thioridazine

Cisapride

Antimalarials: Halofantrine

Terfinadine

Comments

ECG Spotter

What is the diagnosis? Click the button below to view answer: Show Answer

High heart rate

The patient contacts the doctor over phone with this report. Obviously anxious because of his high heart rate (199 beats per minute) as detected by ECG machine. Should he be worried about this and come to emergency department as soon as possible? Correct answer- ECG machine has calculated his heart rate incorrectly. Heart rate is around 100 beats per minute. Other findings in this ECG include ST segment elevation in anterior chest leads along with presence of Q waves, denoting old MI changes with possibly development of LV aneurysm. In such cases, ST segment elevation can persist for long periods. Now, should he come to emergency department? Not because of detection of high heart rate. But, if he is having symptoms such as shortness of breath or chest pain, he should visit emergency department. Otherwise, if he is asymptomatic, he can schedule a regular visit with his cardiologist.

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