Articles  |   December 2019
ACE Question
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Education / CPD / Articles
Articles   |   December 2019
ACE Question
ASA Monitor 12 2019, Vol.83, 38-39.
ASA Monitor 12 2019, Vol.83, 38-39.
Which of the following conditions is most likely to be associated with cannon a waves on a central venous pressure (CVP) tracing?
The normal central venous pressure (CVP) tracing consists of two downward elements (x and y) and three upward elements (a, c, v) (Figure 1, Table 1).
Large a waves, also commonly called cannon a waves (Figure 2), can be seen as a result of two different processes. Causes of cannon a waves include the right atrium contracting against a closed tricuspid valve (junctional rhythms, complete heart block, ventricular tachycardia) and increased resistance to right ventricular emptying (tricuspid stenosis, right ventricular hypertrophy, pulmonary arterial stenosis, pulmonary hypertension).
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