Adverse reactions during treatment with amiodarone hydrochloride.
Why the study?
What are the adverse reactions associated with amiodarone treatment in patients with drug-resistant recurrent cardiac tachyarrhythmias?
Population
80 patients with recurrent cardiac tachyarrhythmias previously resistant to drug treatment
Design
Cohort
Follow-up
range six days to 51 months (total 100 patient years)
Authors
Discussion
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Member takes
Implication
Amiodarone was associated with frequent adverse reactions in resistant tachyarrhythmias; leaves open comparative safety versus alternatives in contemporary cohorts.
Key Points
- To assess the frequency, nature, and severity of adverse reactions and drug interactions during amiodarone hydrochloride therapy in patients with drug-resistant tachyarrhythmias.
- Administered amiodarone to 80 patients with recurrent, drug-refractory tachyarrhythmias (49 with ventricular tachycardia or fibrillation, 31 with supraventricular arrhythmias).
- Monitored patients over follow-up durations spanning six days to 51 months, accumulating 100 patient-years of clinical observation.
- Adverse reactions occurred in 69 of 80 patients, with severe side effects reported in 13 patients and drug discontinuation required in 14 patients.
- Severe toxicities included interstitial pneumonitis (n=4), incessant ventricular tachycardia (n=4), sinus node arrest with escape focus depression (n=3), hepatitis (n=1), and hypercalcemia with renal failure (n=1).
- Clinically significant drug interactions emerged, characterized by elevated serum digoxin concentrations and potentiated warfarin anticoagulation during co-administration.
Structured PICO
What are the adverse reactions associated with amiodarone treatment in patients with drug-resistant recurrent cardiac tachyarrhythmias?
P
Population
80 patients with recurrent cardiac tachyarrhythmias previously resistant to drug treatment (49 with ventricular tachycardia or fibrillation, 31 with supra-ventricular arrhythmias)
I
Intervention
Amiodarone
O
Outcome
Adverse reactionssafety
Amiodarone is associated with frequent and sometimes severe adverse reactions, indicating it should be reserved for life-threatening or highly disabling arrhythmias refractory to other treatments.
Cite This Study
McGovern et al. (1983) studied this question.