title: Regular cannon wave.
abstract: A 52-year-old male with history of dilated cardiomyopathy was admitted with progressive dizziness and worsening dyspnea. His blood pressure was 100/60 with a regular pulse of 70 per minute. Jugular vein wave showed a prominent pulse like regular cannon waves. Cannon wave occurs in conditions with atrioventricular dissociation and right atrial contraction against a closed tricuspid valve. Large A waves are associated with reduced right ventricular compliance or elevated right ventricular end-diastolic pressure.
authors.affiliation: Assistant Professor, Department of Cardiology, Kannur Medical College, Anjarakandy, Kannur, India. Electronic address: drranjithmp@gmail.com.
authors.forename: Mangalachulli Pottammal
authors.initials: MP
authors.lastname: Ranjith
authors.affiliation: Senior Resident, Department of Cardiology, Government Medical College, Kozhikode, India.
authors.forename: Kayakkal
authors.initials: K
authors.lastname: Shajudeen
authors.affiliation: Senior Resident, Department of Cardiology, Government Medical College, Kozhikode, India.
authors.forename: Sankaran
authors.initials: S
authors.lastname: Prasanth
mesh_terms: D006328:Cardiac Catheterization; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D004452:Echocardiography; D004562:Electrocardiography; D006325:Heart Atria / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006327:Heart Block / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D006339:Heart Rate / Q000502:physiology*; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014261:Tricuspid Valve / Q000000981:diagnostic imaging / Q000503:physiopathology*
keywords: Cannon waves; Junctional rhythm; ‘a’ reversal