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[Left ventricular diastolic function in normal pregnancy. A prospective study using M-mode echocardiography and Doppler echocardiography]. 2000

C M Schannwell, and F C Schoebel, and T Zimmermann, and R Marx, and G Plehn, and M Leschke, and B E Strauer
Klinik für Kardiologie, Pneumologie und Angiologie sowie, Heinrich-Heine Universität Düsseldorf. schannw@uni-duesseldorf.de

OBJECTIVE During pregnancy many substantial changes occur in the cardiovascular system. Aim of this study was to examine how physiological preload alterations influence left ventricular haemodynamic parameters. METHODS During the 9th, 24th and 33rd weeks of pregnancy and 8 weeks after childbirth 36 patients underwent echocardiographic studies. 36 young not pregnant women (25 +/- 7 years) served as controls. The following Doppler echocardiographic parameters were measured: peak early diastolic flow velocity (VE, ms); acceleration (AT; ms) and deceleration time (DT; ms) of flow velocity in early diastole; peak late diastolic flow velocity (VA; m/s) and isovolumetric relaxation time (IVRT; ms). In all women the left ventricular muscle mass index (LVMMI), fractional shorting (FS; %) and the ratio between septum and posterior ventricular wall were calculated. RESULTS During pregnancy all women showed an elevation of the left ventricular muscle mass index (LVMMI: from 66 +/- 6 to 100 +/- 9 g/m2; p < 0.01) and a decrease of fractional shortening (FS: from 38 +/- 4 to 31 +/- 3%). All patients developed a relevant diastolic dysfunction: reduced early diastolic flow velocity (VE: from 0.89 +/- 0.11 to 0.83 +/- 0.19 m/s; P < 0.01), reduced E/A ratio (1.7 +/- 0.4 to 1.2 +/- 0.4; P < 0.01), prolonged IVRT (72 +/- 12 to 114 +/- 12 ms; P < 0.01) and deceleration time (DT: to 189 +/- 17 to 227 +/- 18 ms; P < 0.01). Eight weeks after childbirth all parameters of left ventricular systolic and diastolic functions were normal. CONCLUSIONS Preload alterations during normal pregnancy lead to reversible physiological left ventricular hypertrophy. Furthermore, we found a short-time reduction of systolic function just before childbirth and a significant alteration of the left ventricular diastolic filling pattern (abnormal relaxation pattern). While left ventricular systolic function was normal in all patients one week after childbirth, left ventricular hypertrophy and left ventricular diastolic dysfunction persisted for nearly two months.

UI MeSH Term Description Entries
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D011261 Pregnancy Trimester, First The beginning third of a human PREGNANCY, from the first day of the last normal menstrual period (MENSTRUATION) through the completion of 14 weeks (98 days) of gestation. Early Placental Phase,Pregnancy, First Trimester,Trimester, First,Early Placental Phases,First Pregnancy Trimester,First Pregnancy Trimesters,First Trimester,First Trimester Pregnancies,First Trimester Pregnancy,First Trimesters,Phase, Early Placental,Phases, Early Placental,Placental Phase, Early,Placental Phases, Early,Pregnancies, First Trimester,Pregnancy Trimesters, First,Trimesters, First
D011262 Pregnancy Trimester, Second The middle third of a human PREGNANCY, from the beginning of the 15th through the 28th completed week (99 to 196 days) of gestation. Midtrimester,Pregnancy, Second Trimester,Trimester, Second,Midtrimesters,Pregnancies, Second Trimester,Pregnancy Trimesters, Second,Second Pregnancy Trimester,Second Pregnancy Trimesters,Second Trimester,Second Trimester Pregnancies,Second Trimester Pregnancy,Second Trimesters,Trimesters, Second
D011263 Pregnancy Trimester, Third The last third of a human PREGNANCY, from the beginning of the 29th through the 42nd completed week (197 to 294 days) of gestation. Pregnancy, Third Trimester,Trimester, Third,Last Trimester,Last Trimesters,Pregnancies, Third Trimester,Pregnancy Trimesters, Third,Third Pregnancy Trimester,Third Pregnancy Trimesters,Third Trimester,Third Trimester Pregnancies,Third Trimester Pregnancy,Third Trimesters,Trimester, Last,Trimesters, Last,Trimesters, Third
D011446 Prospective Studies Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group. Prospective Study,Studies, Prospective,Study, Prospective
D003971 Diastole Post-systolic relaxation of the HEART, especially the HEART VENTRICLES. Diastoles
D004452 Echocardiography Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic. Echocardiography, Contrast,Echocardiography, Cross-Sectional,Echocardiography, M-Mode,Echocardiography, Transthoracic,Echocardiography, Two-Dimensional,Transthoracic Echocardiography,2-D Echocardiography,2D Echocardiography,Contrast Echocardiography,Cross-Sectional Echocardiography,Echocardiography, 2-D,Echocardiography, 2D,M-Mode Echocardiography,Two-Dimensional Echocardiography,2 D Echocardiography,Cross Sectional Echocardiography,Echocardiography, 2 D,Echocardiography, Cross Sectional,Echocardiography, M Mode,Echocardiography, Two Dimensional,M Mode Echocardiography,Two Dimensional Echocardiography
D005260 Female Females
D005500 Follow-Up Studies Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease. Followup Studies,Follow Up Studies,Follow-Up Study,Followup Study,Studies, Follow-Up,Studies, Followup,Study, Follow-Up,Study, Followup
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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