Right ventricular function before and after an uncomplicated coronary artery bypass graft as assessed by pulsed wave Doppler tissue imaging of the tricuspid annulus - 28/08/11
, Anders Hedman, MD a, Rolf Nordlander, MD, PhD, FESC a, Bassem Samad, MD, PhD aAbstract |
Background |
Right ventricular (RV) function using myocardial velocities before and after a coronary artery bypass graft (CABG) is not known.
Methods |
Using pulsed wave Doppler tissue imaging, RV function was studied in 35 patients before and after CABG. Patients were followed-up for 1 year after the CABG. Myocardial velocities at the tricuspid annulus at the RV free wall were recorded from the apical 4-chamber views.
Results |
Both the systolic and early diastolic tricuspid annular velocities (TAV) were significantly reduced 1 month after CABG (P < .001 for both). During the follow-up period, there was no improvement in the diastolic TAV. The systolic TAV showed no improvement 3 months after CABG but recovered partially 1 year after the CABG (systolic velocities were 11.8, 8.7, 8.7 and 9.7 cm/s, the early diastolic velocities were 11.0, 8.1, 8.1 and 8.2 cm/s before and 1 month, 3 months and 1 year after the CABG, respectively). The systolic and early diastolic velocities of the interventricular septum were unchanged during the follow-up period. Unlike the right ventricle, the mitral annular systolic velocity was unchanged shortly after CABG and showed signs of improvement after 1 year (6.4, 6.9, 6.8 and 7.3 cm/s respectively before and after CABG). Patients underwent dobutamine stress echocardiography (DSE) before and 3 months after the CABG. The systolic TAV increased significantly during the DSE before CABG (11.8 vs 15.8 cm/s, P < .001). However, the increase in systolic TAV was limited during DSE 3 months after CABG (8.7 vs 9.9 cm/s, P < .05).
Conclusion |
RV function, as assessed by TAV, decreased significantly after CABG and the changes were still evident after 1 year. The response of systolic TAV during DSE was more pronounced before CABG than after CABG.
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Vol 146 - N° 3
P. 520-526 - septembre 2003 Retour au numéro
Article précédent
- Impact of age on procedural and 1-year outcome in percutaneous transluminal coronary angioplasty: a report from the NHLBI dynamic registry
- Howard A Cohen, David O Williams, David R Holmes, Faith Selzer, Kevin E Kip, Janet M Johnston, Richard Holubkov, Sheryl F Kelsey, Katherine M Detre
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- Richard B Devereux, Mary J Roman, Vittorio Palmieri, Jennifer E Liu, Elisa T Lee, Lyle G Best, Richard R Fabsitz, Richard J Rodeheffer, Barbara V Howard
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