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J Emerg Med. 2015 Aug;49(2):143-6. doi: 10.1016/j.jemermed.2014.12.065. Epub 2015 Mar 20.

Heat Stroke-Induced Sinoatrial Node Dysfunction.

Author information

1
Department of Emergency Medicine, Temple University Hospital, Philadelphia, PA.

Abstract

BACKGROUND:

Heat stroke has been associated with stress-induced cardiomyopathy and electrocardiogram ST segment elevation and depression. Laboratory studies with dogs have demonstrated heat stroke-induced sinoatrial node dysfunction in the setting of hyperkalemia. No prior case report has described heat stroke-induced complete sinoatrial node dysfunction that resolved in the emergency department.

CASE REPORT:

An 87-year-old female presented to the emergency department with heat stroke and severe bradycardia. Initial electrocardiogram demonstrated complete sinoatrial node dysfunction. The bradycardia responded to external cardiac pacing and the sinoatrial node dysfunction resolved with aggressive cooling. Emergency physicians should be aware that heat stroke can cause complete sinoatrial node dysfunction and that this bradydysthrmia can be treated with aggressive cooling.

KEYWORDS:

ECG; EKG; bradycardia; cooling; electrocardiogram; environmental emergency; heat stroke; sinoatrial node

PMID:
25802161
DOI:
10.1016/j.jemermed.2014.12.065
[Indexed for MEDLINE]

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