Cannon A waves, or cannon atrial waves, are waves seen occasionally in the jugular vein of humans with certain cardiac arrhythmias.

Apr 7, 2009 · Cannon A wave occurs 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.

Cannon A waves are large-amplitude waves seen in the jugular veins during a physical exam and are typically associated with certain heart conditions. This article discusses the causes, symptoms, and treatment of Cannon A waves, including medications, pacemaker, cardioversion, and catheter ablation.

Cannon A waves are encountered during AV block, VT, and in AV nodal reentry (Tung & Healy, 2016). AV nodal reentrant tachycardia may show regular A waves due to simultaneous atrial and ventricular activation.

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.

Jun 29, 2015 · This represents a set of circumstances where the atrium contracts against a closed tricuspid valve, with the force of this contraction being reflected off the valve leaflets, forming a cannon a -wave. This happens with retrograde conduction of ventricular action potentials.

Jan 28, 2016 · Authors: Matthew K.Y. Tung, M.B., B.S., and Stewart Healy, M.B., B.S. Author Info & Affiliations. A 65-year-old man presented with an abrupt onset of heart palpitations and dyspnea during the...

Jan 28, 2016 · A 65-year-old man presented with an abrupt onset of heart palpitations and dyspnea during the previous hour. He had had three similar episodes but had no other known conditions. Examination of the...

The cannon a wave occurs as a result of atrial contraction against a closed tricuspid valve, which occurs sporadically as a result of atrioventricular dissociation. When cannon a waves occur with every beat, it indicates atrioventricular dissociation with retrograde atrial activation from supraventricular tachycardia (e.g., junctional rhythm).

Apr 5, 2025 · Students can gently pull them apart while hearing the “Cannon” sound, linking to the battle’s chaos. 2. Visual Elements Blue Fabric (Ocean Waves): Drape a piece of blue fabric or a scarf over a table or student’s lap. Ripple it gently during the “Waves” sound to visually represent the sea’s movement.