Early Hemodynamic Improvement after Percutaneous Mitral Valve Repair Evaluated by Noninvasive Pressure-Volume Analysis
Autor: | Lucia Segura Schmitz, Stephan H. Schirmer, Ulrich Laufs, Manuel Mehrer, Jan-Christian Reil, Daniel Lavall, Michael Böhm |
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Rok vydání: | 2016 |
Předmět: |
Adult
Male Cardiac output medicine.medical_specialty Mitral Valve Annuloplasty Blood Pressure 030204 cardiovascular system & hematology Sensitivity and Specificity Ventricular Dysfunction Left 03 medical and health sciences 0302 clinical medicine Afterload Internal medicine Mitral valve medicine Humans Radiology Nuclear Medicine and imaging 030212 general & internal medicine Aged Aged 80 and over Ejection fraction business.industry Mitral Valve Insufficiency Reproducibility of Results Stroke Volume Stroke volume Middle Aged Prognosis Myocardial Contraction Treatment Outcome medicine.anatomical_structure Echocardiography Ventricle Cardiology End-diastolic volume Female Cardiology and Cardiovascular Medicine business Percutaneous Mitral Valve Repair |
Zdroj: | Journal of the American Society of Echocardiography. 29:888-898 |
ISSN: | 0894-7317 |
Popis: | Mitral regurgitation represents a volume load on the left ventricle leading to congestion and symptoms of heart failure. The aim of this study was to characterize early hemodynamic adaptions after percutaneous mitral valve (MV) repair.Forty-six consecutive patients with symptomatic high-grade MV insufficiency (mean age, 72 years; 54% men) were prospectively included in the study and examined before and after successful catheter-based clip implantation. Seventy percent of patients had secondary mitral regurgitation. Noninvasive pressure-volume loops were reconstructed from echocardiography with simultaneous blood pressure measurements.MV repair reduced left ventricular end-diastolic volume index from 87 ± 41 to 80 ± 40 mL/m(2) (P .0001). End-systolic volume index was 55 ± 37 mL/m(2) before versus 54 ± 37 mL/m(2) after repair (P = .52). Hence, total stroke volume decreased from 60 ± 23 to 49 ± 16 mL (P .0001), as did total ejection fraction (from 41 ± 14% to 37 ± 13%, P = .002) and global longitudinal strain (from -11 ± 4.9% to -9.1 ± 4.4%, P = .0001). Forward stroke volume, forward ejection fraction, and forward cardiac output remained constant (43 ± 12 mL vs 42 ± 11 mL, 33 ± 17% vs 35 ± 18%, and 3.2 ± 0.9 L/min vs 3.4 ± 0.8 L/min, respectively). Parameters of left ventricular contractility (end-systolic elastance and peak power index) and measurements of afterload (arterial elastance, end-systolic wall stress, and total peripheral resistance) were similar before and after MV repair. Forward ejection fraction correlated more strongly with end-systolic elastance (r = 0.61, P .0001) than did total ejection fraction (r = 0.35, P = .0007) or global longitudinal strain (r = -0.38, P = .0002). Total mechanical energy (pressure-volume area) decreased from 10,903 ± 4,410 to 9,124 ± 2,968 mm Hg × mL (P = .0007) because of reduced stroke work (5,546 ± 2,241 mm Hg × mL vs 4,414 ± 1,412 mm Hg × mL, P .0001). At 3 months, symptom status had improved (76% of patients in New York Heart Association classes I and II), and 97% of patients had mitral regurgitation grade ≤2+.Left ventricular contractility and forward cardiac output remained unchanged after percutaneous MV repair despite decreases in total ejection fraction and global longitudinal strain. The left ventricle was unloaded through reduced end-diastolic volume. Thus, MV repair is associated with an improved hemodynamic state in noninvasive pressure-volume analysis. |
Databáze: | OpenAIRE |
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