Hadano Y, Matsuzaki M. Noninvasive assessment of exercise tolerance using mitral annular velocities.
J Med Ultrason (2001) 2015;
43:37-45. [PMID:
26703165 DOI:
10.1007/s10396-015-0672-y]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/24/2015] [Indexed: 11/29/2022]
Abstract
PURPOSE
To investigate the feasibility of evaluating exercise tolerance using lateral and septal mitral annular velocities in patients with preserved left ventricular ejection fraction (LVEF) and those with reduced LVEF.
METHOD
We studied 36 patients with LVEF ≥50% and 36 with LVEF <50%. We measured peak early diastolic velocity of transmitral flow (E) and peak early diastolic velocities of the lateral (LEa) and septal (SEa) mitral annulus. The ratios of E to LEa (E/LEa) and E to SEa (E/SEa) were calculated. We measured peak oxygen consumption [Formula: see text] and anaerobic threshold (AT) by cardiopulmonary exercise testing.
RESULTS
In patients with LVEF ≥50%, E/LEa correlated well with [Formula: see text] and AT (r = -0.69 and r = -0.74, respectively; p < 0.001); E/SEa correlated modestly (r = -0.59 and r = -0.60, respectively; p < 0.001). In patients with LVEF <50%, E/LEa correlated well with [Formula: see text] and AT (r = -0.72 and r = -0.76; respectively, p < 0.001); E/SEa correlated modestly (r = -0.63 and r = -0.63, respectively; p < 0.001).
CONCLUSION
E/LEa may be more useful than E/SEa for the noninvasive estimation of exercise tolerance, throughout a wide range of LVEF.
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