MedicineCardiologyRadiologyCardiothoracic RadiologyDiagnostic ImagingDiagnostic RadiologyCardiac ImagingCardiothoracic ImagingChest RadiographyChest RadiologyChest X-ray InterpretationAnteroposterior Chest RadiographyBlood PressureCardiac Size EstimationCardiac Size MeasurementCardiothoracic RatioChest Radiography FindingsHeart Size EnlargementSystolic Blood Pressure
Hypertension and Size of Heart Chest radiography was carried out in 332 subjects (143 males and 189 females). There was no significant associa- tion between the systolic or diastolic blood pressure and the,size of the heart estimated from a chest radiograph taken at a distance of 6 feet (1.8 metres). Two independent criteria were used: First, the opinion of the radiologist (J. L. A. G.) on inspecion of the film, and, secondly, the cardio-thoracic ratio (the maximtum width of the heart shadow divided by the externlal width of the bony thorax at that level). Application of the ,X2 test to the results, shown in Table Also the correlation coefficients between the cardio-thoracic ratios and both systolic and diastolic blood pressures were not significant at the 5%level.