Improvement in mitral flow dynamics during exercise after percutaneous transvenous mitral commissurotomy. Noninvasive evaluation using continuous wave Doppler technique.
Key result
Percutaneous transvenous mitral commissurotomy decreased the mean transmitral pressure gradient at submaximal exercise from 21 to 11 mm Hg in patients with mitral stenosis.
Why the study?
Does percutaneous transvenous mitral commissurotomy improve mitral flow dynamics during exercise in patients with mitral stenosis?
Population
20 patients with mitral stenosis
Comparison
Percutaneous transvenous mitral commissurotomy vs Pre-PTMC baseline
Design
Cohort
Follow-up
5 days after PTMC
Authors
Discussion
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Member takes
Implication
Supports PTMC hemodynamic gains during exercise in mitral stenosis; leaves open impact on clinical outcomes.
Study Design
Type
Observational (n=20)
Structured PICO
Does percutaneous transvenous mitral commissurotomy improve mitral flow dynamics during exercise in patients with mitral stenosis?
P
Population
20 patients with mitral stenosis evaluated with exercise Doppler 2 days before and 5 days after percutaneous transvenous mitral commissurotomy.
E
Exposure
Percutaneous transvenous mitral commissurotomy (PTMC)
C
Comparator
Pre-PTMC baseline (evaluated 2 days before the procedure)
O
Outcome
Mitral flow dynamics during exercise (mean transmitral pressure gradient)surrogate
Main Result
Absolute Event Rate: 11% vs 21%
PTMC significantly improves both resting and exercise mitral flow dynamics in patients with mitral stenosis, which can be effectively evaluated noninvasively using continuous wave Doppler.
Cite This Study
Tamai et al. (1990) conducted an observational in Mitral stenosis (n=20). Percutaneous transvenous mitral commissurotomy (PTMC) vs. Pre-PTMC baseline was evaluated on Mean transmitral pressure gradient at submaximal exercise. Percutaneous transvenous mitral commissurotomy decreased the mean transmitral pressure gradient at submaximal exercise from 21 to 11 mm Hg in patients with mitral stenosis.