RESUMEN
BACKGROUND: Increasing left ventricular mass is a risk factor for cardiovascular morbidity and mortality. OBJECTIVE: To examine the possible association of smoking with the left ventricular growth response in men. METHODS: Left ventricular mass was measured in 309 army recruits before and after an identical 12-week physical training programme. Left ventricular mass was determined using cardiovascular magnetic resonance. RESULTS: Left ventricular mass increased with training (mean (standard deviation (SD)) 3.83 (10.81) g, p<0.001). By univariate analysis, exercise-induced change in left ventricular mass was positively associated with cigarette smoking (mean (SD) 1.69 (11.10) g v 4.76 (10.23) g for non-smokers v ex- and current smokers, respectively; p = 0.026), whereas age, height, diastolic and systolic blood pressure (SBP), alcohol consumption or indices of physical activity were not significantly associated with change in left ventricular mass. Multivariate analysis showed body weight, smoking status and SBP to be independent predictors of left ventricular mass (incremental R(2) = 3.4%, p = 0.004; R(2) = 4.9%, p = 0.024; and R(2) = 1.7%, p = 0.041, respectively). CONCLUSIONS: Cigarette smoking and SBP are associated with exercise-induced left ventricular growth in young men. The positive association of smoking with changes in left ventricular mass is surprising, given the limited exposure of these subjects to smoking, and although these data do not prove causation, they are of great interest to those trying to uncover the drivers of left ventricular hypertrophy, as well as to those examining the possible ill-effects of smoking in the young.
Asunto(s)
Ejercicio Físico/fisiología , Hipertrofia Ventricular Izquierda/patología , Fumar/patología , Análisis de Varianza , Ventrículos Cardíacos/anatomía & histología , Ventrículos Cardíacos/crecimiento & desarrollo , Humanos , Estudios Longitudinales , Angiografía por Resonancia Magnética , MasculinoRESUMEN
Anabolic steroid abuse in athletes has been associated with a wide range of adverse conditions, including hypogonadism, testicular atrophy, impaired spermatogenesis, gynaecomastia, and psychiatric disturbance. But what effect does steroid abuse have on the cardiovascular system?
Asunto(s)
Anabolizantes/efectos adversos , Cardiopatías/inducido químicamente , Esteroides/efectos adversos , HumanosRESUMEN
Chronic heart failure is a common disorder placing significant burdens on patients and health-care services. Noninvasive imaging plays a central role in accurate diagnosis, determination of etiology and prognosis, and in monitoring therapy. Advances in technology mean cardiovascular magnetic resonance (CMR) imaging has established itself as both a valuable clinical and research tool in this arena. Not only is CMR the new gold standard for accurate and reproducible assessment of ventricular volumes and mass, but by using gadolinium contrast, underlying pathology can often be determined. In ischemic cardiomyopathy a 'one stop' assessment can be made of function, perfusion and mass. Continuing advances such as myocardial tagging and the increasing availability of CMR mean that it will become an increasingly important and useful tool for clinicians looking after patients with cardiomyopathy and heart failure.