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Background: The cardiodepressor Bezold‐Jarisch reflex (BJR) in acute inferior myocardial infarction (AMI) is traditionally considered as an indicator of successful thrombolysis.

Hypothesis: The study aim was to elucidate the role of the autonomic nervous system in the pathogenesis of a BJR response in patients with AMI by tracing spectral profiles of heart rate variability (HRV).

Methods: We studied 32 patients who presented with BJR after starting intravenous thrombolysis for an inferior AMI. Spectral components of HRV were analyzed over the three specific 5‐min periods preceding and following reflex activation. Clinically, the occurrence of BJR was correlated with the outcome of thrombolysis to achieve timely reperfusion and sustained coronary artery patency.

Results: The BJR was associated with early reperfusion in 94% of the patients, and with benign transient bradyarrhythmias and patent Thrombolysis in …