Lack of electrocardiographic changes in women with polycystic ovary syndrome

The effect of low iron storage without Anaemia on electrocardiography

BACKGROUND

Low iron storage is a common health problem around the world. Although the association of low iron storage with cardiovascular events and various electrocardiographic parameters has been investigated, its association with fragmented QRS (fQRS), T_peak-T_end (Tp-e) interval, Tp-e/QT and Tp-e/QTc ratios, which are important criteria for repolarization, has not been studied in adults.

METHODS

A total of 201 female patients in the 18-50 age group with no history of chronic and cardiac disease or anaemia were included in the study. Patients were divided into 3 groups based on their ferritin levels. Twelve lead EKGs were obtained from each patient, and fQRS, Tp-e interval, Tp-e/QT and Tp-e/QTc ratios were calculated manually.

RESULTS

A total of 201 female patients with an average age of 37 ± 9 were included in the study. Group 1 (ferritin<15 ng/mL) consisted of 79 (39.3%) patients, Group 2 (ferritin 15-30 ng/mL) consisted of 64 patients (31.8%) and Group 3 (ferritin≥30 ng/mL) consisted of 58 (28.9%) patients. Tp-e interval was significantly higher in Group 1 compared to Group 2 and 3 (p < 0.001). A similar relationship was also observed between Tp-e/QT, Tp-e/QTc and fQRS (p < 0.001). A moderate, negative relationship was found in the correlation analysis of Tp-e, Tp-e/QT, Tp-e/QTc and fQRS with ferritin value [r = -0.519 (p = 0.001), r = -0.485 (p = 0.001), r = -0.540 (p = 0.001) and r = -0.345 (p = 0.001), respectively].

CONCLUSION

As a result of the study, it was found that low iron storage may increase arrhythmogenic susceptibility through increased fragmented QRS presence, increased Tp-e interval, Tp-e/QT and Tp-e/QTc ratios in healthy women of childbearing age.

Cardiac conductive disturbance in patients with polycystic ovary syndrome

BACKGROUND

Polycystic ovary syndrome (PCOS) is the most common endocrine abnormality of reproductive-aged women and increases the risk of cardiovascular disease. However, the effects of PCOS on electrocardiograms (ECGs) are not fully elucidated. The aim of this study was to evaluate the characteristics of ECGs in patients with PCOS.

METHODS

This study included 24 patients with PCOS and 12 patients without PCOS. The heart rate, PR interval, QRS duration, Sokolow-Lyon voltage (SV1 + RV5/6), Cornell voltage (RaVL + SV3), QT interval and QTc interval were measured in 12-lead ECGs.

RESULTS

The QRS duration was wider in patients with PCOS than those without PCOS (91 ± 8 vs. 81 ± 10 ms, p < 0.05). The heart rate, PR interval, Sokolow-Lyon voltage, product of the QRS duration times Cornell voltage combination, QT interval, QTc interval, QT dispersion and QTc dispersion were similar between the two groups.

CONCLUSIONS

PCOS is associated with a widening QRS duration, which may contribute to its increased cardiovascular risks.