title: Nonsustained ventricular tachycardia induced by valsalva manoeuvre in a patient with nonobstructive hypertrophic cardiomyopathy.
abstract: Cardiac arrhythmias are rarely inducible in patients with hypertrophic cardiomyopathy on provocative manoeuvres to identify latent obstruction. We present a 40-year-old male with history of nonobstructive hypertrophic cardiomyopathy who presented with lightheadedness. Echocardiogram showed severe asymmetric hypertrophy of the left ventricle without left ventricular outflow tract gradient at rest. On Doppler study with Valsalva manoeuvre, he developed symptomatic nonsustained ventricular tachycardia, which was reproduced on repetition. This emphasizes the importance of provocative manoeuvres to unmask potentially significant physiologic manifestations.
authors.affiliation: Division of Cardiovascular Diseases, Department of Internal Medicine, University of Tennessee Health Science Center Memphis, Tennessee, USA.
authors.forename: M Usman
authors.initials: MU
authors.lastname: Khan
authors.forename: Rami N
authors.initials: RN
authors.lastname: Khouzam
authors.forename: Heena
authors.initials: H
authors.lastname: Khalid
authors.forename: Riaz
authors.initials: R
authors.lastname: Baqir
authors.forename: Marriyam
authors.initials: M
authors.lastname: Moten
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004452:Echocardiography; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000175:diagnosis / Q000503:physiopathology*; D008297:Male; D017180:Tachycardia, Ventricular / Q000175:diagnosis / Q000503:physiopathology*; D014636:Valsalva Maneuver / Q000502:physiology*