#heart chart
- Actinocardiogram — An archaic graphic recording or image obtained through the technique of actinocardiography, reflecting the dynamics, movements, and volume variations of the heart under the action of or with the help of radiation (X-rays). This vintage medical document structurally served as a diagnostic tool in the first half of the last century, providing a crude representation of myocardial pulsations printed directly onto photosensitive film or paper.