TITLE:
The Initial Tangent of the Femoral Arterial Pressure Increase Is an Estimate of Left Ventricular Contractility in Patients Undergoing Cardiacsurgery
AUTHORS:
Matthias Längin, Christian Kowalski, Frank Christ, Bernhard Zwissler, Hille Kisch-Wedel
KEYWORDS:
Arterial Pressure Wave Form Analysis, Left Ventricular Contractility, Cardiacsurgery
JOURNAL NAME:
Open Journal of Anesthesiology,
Vol.4 No.9,
September
16,
2014
ABSTRACT: Purpose: Assessment of contractile function is a major challenge in
patients with left ventricular dysfunction, especially during cardiac surgery.
The initial tangent of the femoral arterial pressure increase (tanin)
has recently been described to be an estimate of left ventricular (LV)
contractility. To confirm these findings tanin was compared to
various indices of LV performance in patients undergoing cardiac surgery.
Methods: Data from 17 patients were evaluated retrospectively. Myocardial
performance was estimated by the echocardiographic indices ejection fraction
(EF), shortening fraction (FS), circumferential fiber shortening velocity
(Vcf), the parameters of pulse contour analysis area under the curve (AUC) and tanin. Measurements were taken before
and after cardiopulmonary bypass (CPB). Results: Tanin increased
significantly (813 ± 216 mmHg/s vs. 1490 ± 450 mmHg/s, p in and Vcf correlated strongly (r = 0.70, p in showed only weak correlation with EF (r = 0.36,
p = 0.037). There was no significant correlation with FS (r = 0.31, p = 0.079).
Tanin and AUC correlated inversely (r = -0.62, p in correlated well with the less preload-dependent parameter Vcf,
thus suggesting that tanin may be used as an easily accessible
estimate of LV contractility during cardiac surgery.