Starting with A for "ACE inhibitor" and continuing through to Y for "Yolk Sac Tumour", we give you succinct explanations for scientific and medical terms in clear and simple words.
- ElectrocardiographyAbbreviated as ECG
Procedure to measure the electrical activity of the heart, which is recorded from the surface of the body, from the heart itself or from the oesophagus, as a curve known as the electrocardiogram. The oscillations of the curve correspond to the individual phases of the cardiac cycle. The curves arise as the sum of the intensities and direction of the conduction in the individual heart muscle fibres and nerve fibres. Electrocardiography permits conclusions about cardiac rhythm and heart rate (number of cycles per minute), position of the heart and abnormalities in the formation, propagation and regression of electrical excitation of heart muscle. This also provides indirect information on changes in the shape of the heart. Cf. stress echocardiography.
Glossary entries: Roche and Walter de Gruyter, Berlin