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Cardiac flow velocity in women with the polycystic ovary syndrome
G M Prelevic1, T Beljic, L Balint-Peric
1Department of Medicine, UCL Medical School, Royal Free Hospital, London, UK.
Objective:
Women with the polycystic ovary syndrome (PCOS) often have several of the known risk factors for cardiovascular disease, including hyperinsulinaemia. We have therefore investigated variables of cardiac flow in young women with PCOS and related them to blood levels of reproductive hormones (LH, FSH, oestradiol and testosterone) and also of insulin.
Design:
A prospective study.
Patients:
Twenty-six young women with PCOS (mean age 22.8 +/- 0.9 years; mean BMI 23.0 +/- 0.8) and 11 healthy age matched women with regular ovulatory cycles (mean age 26.3 +/- 1.7 years; mean BMI 22.9 +/- 0.9).
Measurements:
Cardiac flow was measured by pulsed wave Doppler echocardiography in the follicular phase of the cycle in controls and oligomenorrhoeic women; there was no special timing for amenorrhoeic women. The indicators assessed were: ejection fraction (EF), pre-ejection time (PEP), ejection time (ET), peak systolic flow velocity (PFV), acceleration time (AT), flow velocity integral (FVI), mean acceleration (MA), diastolic time (DT), early diastolic filling time (Ei), atrial filling time interval (Ai), peak velocity of the early diastolic filling (PE) and peak velocity of the atrial filling (PA). Serum LH, FSH, oestradiol, testosterone, SHBG and insulin concentrations were analysed by standard RIA.
Results:
Significantly lower PFV (1.055 +/- 0.025 vs 1.242 +/- 0.054, P = 0.0006) and MA (17.06 +/- 0.57 vs 23.00 +/- 1.49, P = 0.0001) and longer AT (0.063 +/- 0.001 vs 0.056 +/- 0.004, P = 0.026) were found in women with PCOS as compared to age matched controls. Significant negative correlation between serum fasting insulin concentration and EF (r = -0.725, P = 0.002), PFV (r = -0.719, P = 0.0025), FVI (r = -0.654, P = 0.008) and MA (r = -0.757, P = 0.001) was observed in the 15 women with PCOS in whom insulin was measured.
Conclusion:
An inverse relation between serum fasting insulin level and left ventricular systolic outflow parameters suggests that insulin is associated with the decreased systolic flow velocity observed in women with PCOS.