Key result
Dobutamine sestamibi stress testing induced transient complete heart block in a patient, highlighting it as a potential risk during dobutamine-induced stress echocardiography.
Case Report (n=1)
This case highlights that complete heart block is a potential risk during dobutamine-induced stress testing.
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Alerts clinicians to rare conduction block risk during dobutamine stress testing; single case leaves open incidence and protocol implications.
Dobutamine is commonly administered as a pharmacologic stressor in patients with limitations precluding exercise testing. The case report presented is one of transient complete heart block resulting from dobutamine sestamibi stress testing. Shortly after initiating the dobutamine infusion, the patient became pale and presyncopal, with hypotension and a heart rate of 50 beats per minute. Subsequently, third-degree heart block developed which lasted transiently and resolved. Subsequent cardiac evaluation of the patient revealed no cardiac etiology for her symptoms. Though bradycardia is infrequently noted in patients receiving dobutamine during stress electrocardiogram, complete heart block is a possibility during dobutamine-induced stress echocardiography and must be recognized as a potential risk.
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Vaidyanathan et al. (2008) conducted a case report in Patients undergoing dobutamine sestamibi stress testing (n=1). Dobutamine sestamibi stress testing was evaluated on Complete heart block. Dobutamine sestamibi stress testing induced transient complete heart block in a patient, highlighting it as a potential risk during dobutamine-induced stress echocardiography.
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