title: Seasonal variation of cardiac failure in northern Nigeria.
abstract: The number of patients with cardiac failure admitted to hospital in Zaria, Nigeria, month by month during 1972-75 differed highly significantly between the cooler dry months and the hot wet months. The reasons are uncertain, but seasonal changes in blood-pressure and the effects of heat on the circulation and of humidity on the efficiency of sweating may be responsible.
mesh_terms: D001022:Aortic Valve Insufficiency / Q000453:epidemiology / Q000209:etiology; D006332:Cardiomegaly / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006331:Heart Diseases / Q000209:etiology*; D006760:Hospitalization; D006358:Hot Temperature; D006801:Humans; D006813:Humidity; D006973:Hypertension / Q000453:epidemiology / Q000209:etiology; D008297:Male; D009549:Nigeria; D011247:Pregnancy; D011644:Puerperal Disorders / Q000453:epidemiology / Q000209:etiology; D011660:Pulmonary Heart Disease / Q000453:epidemiology / Q000209:etiology; D012214:Rheumatic Heart Disease / Q000453:epidemiology; D012621:Seasons; D014329:Tropical Climate