Article Sidebar
Article Details
Copyright remains in the Author’s name. The work is licensed under a Creative Commons Attribution - Noncommercial Works License. Authors are required to complete and sign an Author Agreement form that outlines Author and Publisher rights and terms of publication. The Agreement form should be uploaded along with other submissions files and any submission will be considered incomplete without it [forthcoming].
Material submitted for publication in the SAMJ is accepted provided it has not been published or submitted for publication elsewhere. Please inform the editorial team if the main findings of your paper have been presented at a conference and published in abstract form, to avoid copyright infringement. The SAMJ does not hold itself responsible for statements made by the authors.
Previously published images
If an image/figure has been previously published, permission to reproduce or alter it must be obtained by the authors from the original publisher and the figure legend must give full credit to the original source. This credit should be accompanied by a letter indicating that permission to reproduce the image has been granted to the author/s. This letter should be uploaded as a supplementary file during submission.
Main Article Content
Multiple coronary vasospasm: a cause of repeated myocardial infarction and symptomatic 'torsade de pointes' (atypical ventricular tachycardia) A case presentation and review
Abstract
A middle-aged Coloured man had a 6-year history of chest pain induced by effort and also experienced at rest. Quite dramatic episodes of associated arrhythmias, specifically 'torsade de pointes' (atypical ventricular tachycardia) and syncope were experienced by the patient, despite the use of numerous anti-arrhythmic and anti-anginal agents. Transmural anteroseptaI and non-transmural. anterolateral myocardial infarctions were documented in the presence of a normal left coronary artery (LCA). Severe reversible vasospasm of the right coronary artery (RCA) was provoked with the use of ergonovine (ergometrine) maleate at cardiac catheterization. It is postulated that the cause of the previous myocardial infarctions was significant vasospasm of the LCA branches, and that he was subject to multiple coronary vasospasm, as was highlighted by the visualization of spasm superimposed on atheromatous plaque within the RCA. Furthermore, it is strongly suggested that the potentially lethal ventricular arrhythmias, including 'torsade de pointes', were a direct result of coronary vasospasm which in turn gave rise to his presyncope and syncope attacks. No evidence of sinoatrial node disease could be found. The only risk factor for ischaemic heart disease which applied in his case was heavy cigarette smoking. Control of his disabling symptoms seems to have been achieved by' the use of maintenance nifedipine (a calcium-blocking agent), long-acting nitrates (isosorbide dinitrate) and quinidine gluconate, confirming the probable vasospastic aetiology of the 'torsade de pointes'. At no stage was there dangerous prolongation of the QT interval, an oftquoted prerequisite for this·arrhythmia. Some of the more important aspects of coronary vasospasm are discussed; as far as I am aware this is the first patient documented in the literature with 'torsade de pointes' associated with angiographically demonstrated coronary artery spasm.
