This RA trace was recorded in cath lab under endotracheal
general anesthesia.
Question: Which wave is the taller one, a wave or v wave?
Answer: a wave (See labelled images below).
RA pressure trace consists of a, c, v waves and x, y
descents.
a – atrial systole (occurs immediately after P wave. Note:
electrical activity precedes mechanical activity). Dotted line helps to compare
the P wave to the RA waveform.
c – bulging of tricuspid valve “cusps” during onset of
ventricular systole. This will appear just after LV pressure trace crosses the
atrial wave.
v – venous filling (occurs during atrial diastole which is
ventricular systole). Therefore, v wave should coincide with ejection phase of
ventricle as shown in LV trace or PA line trace.
(Click on the image to enlarge)
Additional images from the same patient - recorded with LPA pressure in one panel and with LV pressure in the other panel. Label indicates where c wave will be expected.
No comments:
Post a Comment
Comments are moderated.