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Jamaican idiopathic cardiomegaly, a possible variant of the athletic heart syndrome in men with high levels of customary activity - abstract
West Indian med. j ; 20(4): 256, Dec. 1971.
Artigo em Inglês | MedCarib | ID: med-6344
Biblioteca responsável: JM3.1
Localização: JM3.1; R18.W4
ABSTRACT
A cardiovascular survey in a rural Jamaican community identified a group with suspected early idiopathic cardiomegaly. Forty and seven normotensive men and women respectively were investigated for further evidence of this disease, and to search for clues to its aetiology. There were 12 men with large Q waves, 6 men with short P-R interval (pre-excitation), 8 men with prolonged A-V conduction, 9 men with very unusual electrocardiograms, considered most likely to have idiopathic cardimegaly, 5 men with positive responses to an angina questionnaire, 7 women with T-wave inversion in precordial leads. Their results were compared with those of twelve men without evidence of cardiovascular disease. After interview, examination and anthropometry, cardio-respiratory and electrocardiographic excercise responses were measured on a cycle ergometer while subjects exercised to a pulse rate 90 percent of the predicted maximum. Fourteen men performed maximal exercise studies. The great majority of men, but no women, had high levels of customary activity imposed by the terrain of their working environment, and correspondingly athletic responses to the excercise test. No subject developed angina or ECG ischaemia, but five men had a significant excercise arrythmia. At an oxygen intake of 1.51/min the means of cardiac frequency (Cf1.5) and minute ventilation (VE1.5) for the 52 men were 114/min and 43.4 litres respectively. Corresponding values for women were 151/min and 52.7 litres. Mean maximal oxygen intakes/kg lean body mass were 51.5 ml for men and 42.9 ml for women. The athletic performance, low resting pulse, radiographic cardiomegaly, and distinctive electrocardiogram of these men are all features of the athletic heart syndrome, in which potentially dangerous arrythmias can lead to sudden death. It is suggested that some examples of Jamaican idiopathic cardiomegaly in men may be due to a disorder of cardiac rhythm that develops in subjects with ventricular hypertrophy (AU)
Assuntos
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Coleções: Bases de dados internacionais Base de dados: MedCarib Assunto principal: Cardiomegalia Limite: Feminino / Humanos / Masculino País/Região como assunto: Caribe Inglês / Jamaica Idioma: Inglês Revista: West Indian med. j Ano de publicação: 1970 Tipo de documento: Artigo / Congresso e conferência
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Coleções: Bases de dados internacionais Base de dados: MedCarib Assunto principal: Cardiomegalia Limite: Feminino / Humanos / Masculino País/Região como assunto: Caribe Inglês / Jamaica Idioma: Inglês Revista: West Indian med. j Ano de publicação: 1970 Tipo de documento: Artigo / Congresso e conferência
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