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  • Title: Relation of electrocardiographic left ventricular hypertrophy to blood pressure, body mass index, serum lipids and blood sugar levels in adult Nigerians.
    Author: Opadijo OG, Omotoso AB, Akande AA.
    Journal: Afr J Med Med Sci; 2003 Dec; 32(4):395-9. PubMed ID: 15259925.
    Abstract:
    Left ventricular hypertrophy (LVH) is considered an independent risk factor even in the absence of systemic hypertension. Electrocardiographic (ECG) LVH with repolarisation changes has been found in some countries to carry more coronary risk than LVH alone. How far this observation is true among adult Nigerians is not known. We therefore decided to study adult Nigerians with ECG-LVH with or without ST-T waves changes and compare them with normal age matched controls (without ECG-LVH) in relation with established modifiable risk factors such as systemic hypertension (BP), body mass index (BMI), fasting blood sugar (FBS) and serum lipids such as total cholesterol (Tc), low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C) and triglyceride (TG). Adult Nigerians who were consecutively referred to the ECG laboratory were randomly recruited. Three hundred patients were studied. Their blood pressures (BP) as well as body mass indices were recorded after recording their resting 12 read ECG using portable Seward 9953 ECG machine. Their waist-hip ratio (WHR) was also recorded. Blood samples were taken to determine their fasting blood sugar and serum lipids. Their ECG tracings were read by the cardiologists involved in the study while the blood samples were analysed by the chemical pathologist also involved in the study. At the end of the ECG reading, the patients were divided into 3 groups according to whether there was no ECG-LVH (control group A), ECG-LVH alone (group B), and ECG-LVH with ST-T waves changes (group C). One hundred and fifty (50%) patients belonged to group A, 100 (33.3%) patients to group B and 50 (16.7%) group C. Group B patients were found to have higher modifiable risk factors in form of systemic BP. Tc, LDL-C, and WHR compared to group A. However, the group C patients had increased load of these coronary risk factors in terms of BP elevation, higher BMI, FBS, and scrum cholesterol compared to group B. In addition, more female patients were involved in group C. The mean age of group C patients compared to group B was also significantly higher (P<0.001) even though no significant age difference was noted between group C and group A patients. It is concluded that Nigerians with ECG-LVH with ST-T waves changes have increased risk of cardiovascular risk factors compared to normal group A patients and even patients with EGC-LVH (group B) alone. Hence, they represent subset of patients to be aggressively followed up with multiple risk factors intervention.
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