The singular and plural forms <unk> ,<unk>  and<unk>  have all often been used. The question of whether each one is grammatically "correct" and the others "incorrect" has repeatedly arisen. This is seen among major medical dictionaries, where one enters only the plural form, another enters the plural form as the headword but lists the singular as a variant, and yet another enters the singular form as the headword and gives a usage comment saying that the plural is not preferred. One group of physicians has suggested that it would make the most sense to use the singular form to refer to the arrhythmia entity (where an arrhythmia may involve one or multiple episodes), and that one might best reserve the plural form for<unk> scribing repeated twisting during a single episode. Other authors have suggested all three words should be plural. Regarding the natural language variation, they concluded, in good nature, "Wasn't it the French who coined the term vive la difference?"
Torsades de pointes
Ventricular fibrillation
Pre-excitation syndrome
Brugada syndrome
Pacemaker syndrome
Takotsubo cardiomyopathy
Sudden arrhythmic death syndrome
Unstable angina