TY - JOUR
T1 - Outcomes in asymptomatic severe aortic stenosis with preserved ejection fraction undergoing rest and treadmill stress echocardiography
AU - Huded, Chetan P.
AU - Masri, Ahmad
AU - Kusunose, Kenya
AU - Goodman, Andrew L.
AU - Grimm, Richard A.
AU - Gillinov, A. Marc
AU - Johnston, Douglas R.
AU - Rodriguez, L. Leonardo
AU - Popovic, Zoran B.
AU - Svensson, Lars G.
AU - Griffin, Brian P.
AU - Desai, Milind Y.
N1 - Publisher Copyright:
© 2018 The Authors.
PY - 2018/4/17
Y1 - 2018/4/17
N2 - Background--In asymptomatic patients with severe aortic stenosis and preserved left ventricular ejection fraction, we sought to assess the incremental prognostic value of resting valvuloarterial impedence (Zva) and left ventricular global longitudinal strain (LVGLS) to treadmill stress echocardiography. Methods and Results--We studied 504 such patients (66±12 years, 78% men, 32% with coronary artery disease who underwent treadmill stress echocardiography between 2001 and 2012. Clinical and exercise variables (% of age-sex predicted metabolic equivalents [%AGP-METs]) were recorded. Resting Zva ([systolic arterial pressure+mean aortic valve gradient]/[LV-stroke volume index]) and LV-GLS(measured offline using Velocity Vector Imaging, Siemens) were obtained from the baseline resting echocardiogram. Death was the primary outcome. There were no major adverse cardiac events during treadmill stress echocardiography. Indexed aortic valve area, Zva, and LV-GLS were 0.46±0.1 cm2/m2, 4.5±0.9 mm Hg/mL per m2 and -16±4%, respectively; only 50% achieved > 100% AGP-METs. Sixty-four percent underwent aortic valve replacement. Death occurred in 164 (33%) patients over 8.9±3.6 years (2 within 30 days of aortic valve replacement). On multivariable Cox survival analysis, higher Society of Thoracic Surgeons score (hazard ratio or HR 1.06), lower % AGP-METS (HR 1.16), higher Zva (HR 1.25) and lower LV-GLS (HR 1.12) were associated with higher longerterm mortality, while aortic valve replacement (HR 0.45) was associated with improved survival (all P < 0.01). Sequential addition of ZVa and LV-GLS to clinical model (Society of Thoracic Surgeons score and %AGP-METs) increased the c-statistic from 0.65 to 0.69 and 0.75, respectively, both P < 0.001); findings were similar in the subgroup of patients who underwent aortic valve replacement. Conclusions--In asymptomatic patients with severe aortic stenosis undergoing treadmill stress echocardiography, LV-GLS and ZVa offer incremental prognostic value.
AB - Background--In asymptomatic patients with severe aortic stenosis and preserved left ventricular ejection fraction, we sought to assess the incremental prognostic value of resting valvuloarterial impedence (Zva) and left ventricular global longitudinal strain (LVGLS) to treadmill stress echocardiography. Methods and Results--We studied 504 such patients (66±12 years, 78% men, 32% with coronary artery disease who underwent treadmill stress echocardiography between 2001 and 2012. Clinical and exercise variables (% of age-sex predicted metabolic equivalents [%AGP-METs]) were recorded. Resting Zva ([systolic arterial pressure+mean aortic valve gradient]/[LV-stroke volume index]) and LV-GLS(measured offline using Velocity Vector Imaging, Siemens) were obtained from the baseline resting echocardiogram. Death was the primary outcome. There were no major adverse cardiac events during treadmill stress echocardiography. Indexed aortic valve area, Zva, and LV-GLS were 0.46±0.1 cm2/m2, 4.5±0.9 mm Hg/mL per m2 and -16±4%, respectively; only 50% achieved > 100% AGP-METs. Sixty-four percent underwent aortic valve replacement. Death occurred in 164 (33%) patients over 8.9±3.6 years (2 within 30 days of aortic valve replacement). On multivariable Cox survival analysis, higher Society of Thoracic Surgeons score (hazard ratio or HR 1.06), lower % AGP-METS (HR 1.16), higher Zva (HR 1.25) and lower LV-GLS (HR 1.12) were associated with higher longerterm mortality, while aortic valve replacement (HR 0.45) was associated with improved survival (all P < 0.01). Sequential addition of ZVa and LV-GLS to clinical model (Society of Thoracic Surgeons score and %AGP-METs) increased the c-statistic from 0.65 to 0.69 and 0.75, respectively, both P < 0.001); findings were similar in the subgroup of patients who underwent aortic valve replacement. Conclusions--In asymptomatic patients with severe aortic stenosis undergoing treadmill stress echocardiography, LV-GLS and ZVa offer incremental prognostic value.
KW - Aortic stenosis
KW - Strain
KW - Stress echocardiography
UR - http://www.scopus.com/inward/record.url?scp=85045322632&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85045322632&partnerID=8YFLogxK
U2 - 10.1161/JAHA.117.007880
DO - 10.1161/JAHA.117.007880
M3 - Article
C2 - 29650708
AN - SCOPUS:85045322632
SN - 2047-9980
VL - 7
JO - Journal of the American Heart Association
JF - Journal of the American Heart Association
IS - 8
M1 - e007880
ER -