Cardio-thoracic ratio
Encyclopedia
The Cardio-thoracic ratio is defined as:
"The transverse diameter of the heart
, as determined by x-ray
examination, compared with that of the thoracic cage, used to help determine enlargement of the heart
."
This measurement is taken from PA x-rays.
"The transverse diameter of the heart
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...
, as determined by x-ray
X-ray
X-radiation is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays and longer than gamma...
examination, compared with that of the thoracic cage, used to help determine enlargement of the heart
Cardiomegaly
Cardiomegaly is a medical condition wherein the heart is enlarged. It is generally categorized in the following manner:* Cardiomegaly due to dilation* Cardiomegaly due to ventricular hypertrophy** Left ventricular hypertrophy...
."
This measurement is taken from PA x-rays.