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Clinical introduction
A 71-year-old man attended the emergency department with an episode of transient loss of consciousness. He had collapsed while standing from a sitting position soon after a hot bath. There was no antecedent chest pain; however, following this episode, he reported new onset exertional dyspnoea while walking around his home. Electrocardiography on presentation demonstrated intermittent left bundle branch block (QRS duration 145 ms), and an echocardiogram confirmed a normal size left ventricle with normal left ventricular systolic …
Footnotes
Contributors AJM wrote the first draft of the manuscript. AJ and J-PC were involved in the care of the patient and made revisions to the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent for publication Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.