1. Left atrial flow propagation velocity: a new approach for assessment of left atrial reservoir function
- Author
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Lubanda Jc, Tomas Palecek, Radka Trckova, and Aleš Linhart
- Subjects
Adult ,Male ,medicine.medical_specialty ,Reservoir function ,Valsalva Maneuver ,medicine.medical_treatment ,Vasodilator Agents ,Flow propagation ,Sublingual administration ,Nitroglycerin ,Young Adult ,Left atrial ,Predictive Value of Tests ,Internal medicine ,Valsalva maneuver ,Medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Heart Atria ,Cardiac imaging ,Echocardiography, Doppler, Pulsed ,Observer Variation ,Analysis of Variance ,business.industry ,Hemodynamics ,Reproducibility of Results ,Echocardiography, Doppler, Color ,Compliance (physiology) ,Preload ,Pulmonary Veins ,Anesthesia ,Cardiology ,Feasibility Studies ,Atrial Function, Left ,Female ,Cardiology and Cardiovascular Medicine ,business ,Blood Flow Velocity ,Compliance ,Muscle Contraction - Abstract
To assess the feasibility of left atrial flow propagation velocity (LAFPV) measurement and to evaluate the influence of preload alterations on this new parameter of left atrial (LA) reservoir function as compared to conventional echocardiographic indices. 30 healthy volunteers (26 ± 5 years, 20 males) underwent echocardiographic examination at rest, during passive leg lifting and after sublingual administration of nitroglycerine with subsequent Valsalva maneuver. LA reservoir function was assessed by conventional indices including LA expansion index, peak velocity and velocity-time integral of pulmonary venous systolic flow. As well, LAFPV was measured by color M-mode in an apical 4-chamber view as the slope of the transatrial flow wave during LA reservoir phase. LAFPV measurement was feasible in 25 subjects (83%). All conventional parameters of LA reservoir function were significantly altered from resting values by both load-modifying conditions. However, LAPFV was not significantly altered by such maneuvers (228 ± 28 cm s−1 at rest vs. 238 ± 33 cm s−1 during leg lifting, P = NS, vs. 218 ± 38 cm s−1 after nitroglycerin with Valsalva maneuver, P = NS vs. rest, P
- Published
- 2010