<prompt> For the following cardiac abnormalities, select the characteristic JVP finding.Complete heart blockCannon a waveprominent x descentKussmauls signslow y descent  <response>: Large a waves occur with increased resistance to filling tricuspid stenosis, pulmonary hypertension or when the right atrium contracts against a tricuspid valve closed by right ventricular systole Cannon a waves in complete heart block or other arrhythmias. 