Key result
Class IC anti-arrhythmic drugs increase pacemaker pacing thresholds and require caution, whereas corticosteroids and sympathomimetics lower pacing thresholds.
Why the study?
Cardiac medications can interact with pacemaker function to alter pacing thresholds, requiring adequate programming for safety.
Do cardiac medications alter pacemaker thresholds in patients with implanted pacemakers?
Do cardiac medications alter pacemaker thresholds in patients with implanted pacemakers?
Certain cardiac medications, particularly Class I anti-arrhythmics, can significantly alter pacemaker thresholds, necessitating careful monitoring and programming of pacing margins in pacemaker-dependent patients.
Answers are grounded in this paper and cite their sources.
Alerts clinicians to medication effects on pacing thresholds; leaves open need for prospective confirmation.
A pacemaker patient who takes cardiac medication must be informed of the possible drug interaction. Medication effect on pacemaker function could lead to increase or decrease threshold. The pacemaker output should be programmed to allow an adequate pacing margin of safety. The objective of this review article was to discuss the effects of cardiac medications on pacemaker threshold.
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Ea et al. (2020) conducted a review in Patients with implanted pacemakers requiring cardiac medications. Cardiac medications (anti-arrhythmics, antihypertensives, corticosteroids) was evaluated on Pacemaker pacing and sensing thresholds. Class IC anti-arrhythmic drugs increase pacemaker pacing thresholds and require caution, whereas corticosteroids and sympathomimetics lower pacing thresholds.
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