Stroke volume calculated from the mitral valve echogram in patients with and without ventricular dyssynergy.
Why the study?
Does a formula based on the mitral valve echogram accurately calculate stroke volume compared to thermodilution or Fick methods in patients with and without ventricular dyssynergy?
Population
80 consecutive patients
Comparison
Calculation of mitral valve stroke volume using… vs Thermodilution or Fick cardiac output measurements
Design
Cohort
Authors
Discussion
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Member takes
Implication
Supports mitral echogram for stroke volume estimation without MR; leaves open validation in contemporary cohorts.
Structured PICO
Does a formula based on the mitral valve echogram accurately calculate stroke volume compared to thermodilution or Fick methods in patients with and without ventricular dyssynergy?
P
Population
80 consecutive patients (16 normal, 54 with coronary artery disease, 3 with cardiomyopathy, and 7 with nonrheumatic mitral regurgitation)
I
Intervention
Calculation of mitral valve stroke volume (MVSV) using a derived formula based on the mitral valve echogram (DE slope, EE distance, PR interval, and heart rate)
C
Comparator
Thermodilution or Fick cardiac output measurements
O
Outcome
Accuracy of calculated stroke volume and cardiac output (linear regression r and SEE)surrogate
The mitral valve echogram provides an accurate method for calculating stroke volume in patients without mitral regurgitation, regardless of the presence of ventricular dyssynergy.
Cite This Study
Rasmussen et al. (1978) studied this question.