Archives of the Turkish Society of Cardiology
Impaired right ventricular functions in metabolic syndrome patients with preserved left ventricular ejection fraction [Turk Kardiyol Dern Ars]
Turk Kardiyol Dern Ars. 2011; 39(7): 549-556 | DOI: 10.5543/tkda.2011.01512

Impaired right ventricular functions in metabolic syndrome patients with preserved left ventricular ejection fraction

Özlem Karakurt1, Sanem Öztekin2, Nuray Yazıhan3, Ramazan Akdemir1
1Ministry of Health Dışkapı Yıldırım Beyazıt Training And Education Hospital, Cardiology Clinic, Ankara, Turkey
2Ministry of Health Dışkapı Yıldırım Beyazıt Training And Education Hospital, Internal Medicine Clinic, Ankara, Turkey
3Molecular Biology Research And Development Unit, Faculty of Medicine, Ankara University, Ankara, Turkey


OBJECTIVES
Metabolic syndrome (MetS) has been shown to be independently associated with increased risk for incident heart failure and coronary artery disease. We investigated whether there is deterioration in right ventricular functions in MetS patients with preserved left ventricular functions and its association with the number of MetS components.

STUDY DESIGN
The study included 192 consecutive patients (148 women, 44 men; mean age 54.3±8.5 years) with the diagnosis of MetS based on the NCEP-ATP III criteria and 20 healthy controls (12 women, 8 men; mean age 51.6±8.4 years). All subjects underwent conventional and tissue Doppler (TDI) echocardiography to assess left and right ventricular functions, including right ventricular myocardial performance index (MPI) and tricuspid annular plane systolic excursion (TAPSE).

RESULTS
The number of MetS components were three in 43.8%, four in 31.3%, and five in 25% of the patients. Right ventricular TDI-derived MPI was higher in patients with MetS compared to controls [median 0.5 (range 0.2-3.3) vs. 0.3 (0.1-0.7), p=0.000]. This was possibly due to significantly shortened right ventricular ejection time in MetS patients (p<0.05). Although TAPSE was within the normal range in MetS patients, it was significantly decreased compared to controls (p=0.000), accompanied by significantly lower TDI-derived S wave, E wave, and E/A ratio (p=0.000). None of the MetS components were significantly correlated with right ventricular TDI-derived MPI. There was no association between the number of MetS components and echocardiographic parameters.

CONCLUSION
Our findings show that, despite preserved left ventricular systolic functions, both systolic and diastolic functions of the right ventricle deteriorate in MetS patients.

Keywords: Echocardiography, Doppler, metabolic syndrome X; myocardial contraction; ventricular function, right

How to cite this article
Özlem Karakurt, Sanem Öztekin, Nuray Yazıhan, Ramazan Akdemir. Impaired right ventricular functions in metabolic syndrome patients with preserved left ventricular ejection fraction. Turk Kardiyol Dern Ars. 2011; 39(7): 549-556

Corresponding Author: Özlem Karakurt, Türkiye
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