Rapid Estimation of Left Ventricular Contractility from End-Systolic Relations by Echocardiographic Automated Border Detection and Femoral Arterial Pressure
Key result
Estimation of left ventricular contractility using femoral arterial pressure and echocardiographic automated border detection closely correlated with estimates using LV pressure (r = 0.96).
Why the study?
Can femoral arterial pressure and LV area by echocardiographic automated border detection accurately estimate LV contractility compared to direct LV pressure in patients undergoing cardiac surgery?
Study Design
Type
Observational (n=18)
Structured PICO
Can femoral arterial pressure and LV area by echocardiographic automated border detection accurately estimate LV contractility compared to direct LV pressure in patients undergoing cardiac surgery?
P
Population
18 consecutive patients undergoing cardiac surgery evaluated for left ventricular contractility before and immediately after cardiopulmonary bypass.
E
Exposure
Estimation of end-systolic pressure-area elastance (E'es) using femoral arterial pressure and left ventricular (LV) area by echocardiographic automated border detection
C
Comparator
Estimation of E'es using direct left ventricular (LV) pressure and LV area
O
Outcome
Correlation and agreement between E'es estimated by arterial pressure versus LV pressuresurrogate
Main Result
Effect estimate: r = 0.96
Femoral arterial pressure combined with echocardiographic automated border detection of LV area can rapidly and accurately estimate LV contractility in cardiac surgery patients without requiring direct LV pressure measurement.
Authors
Discussion
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Implication
May enable real-time LV contractility estimation in cardiac surgery; hypothesis-generating and requires prospective validation before clinical adoption.
Cite This Study
Gorcsan et al. (1994) conducted an observational in Cardiac surgery (n=18). Femoral arterial pressure and LV area by echocardiographic automated border detection vs. LV pressure and LV area was evaluated on Correlation between E'es by arterial pressure and E'es by LV pressure (r = 0.96). Estimation of left ventricular contractility using femoral arterial pressure and echocardiographic automated border detection closely correlated with estimates using LV pressure (r = 0.96).