| ROI | reactive oxygen intermediate; region of interest; right occipitolateral [fetal position] |
|---|---|
| ROP | removal of pins or plates; removal of plaster [of Paris]; retinopathy of prematurity; right occipito... |
| ROT | real oxygen transport; remedial occupational therapy; right occipito-transverse [fetal position] |
| RSA | rabbit serum albumin; regular spiking activity; relative specific activity; relative standard accura... |
| RScA | right scapuloanterior [fetal position] |
| left heart | The left atrium and left ventricle. (05 Mar 2000) |
|---|---|
| left heart bypass | Any procedure that shunts blood returning from the pulmonary circulation to the systemic circulation without passing through the left heart. This is utilised during some cardiac surgery and experimentally during severe left heart failure or cardiogenic shock. (05 Mar 2000) |
| left-sided heart failure | Inability of the left heart to maintain its circulatory load with corresponding rise in pressure in the pulmonary circulation usually with pulmonary congestion and ultimately pulmonary oedema. (05 Mar 2000) |
| frosted heart | Hyaloserositis involving the pericardium. Synonym: icing heart. (05 Mar 2000) |
| lion-heart | A very brave person. Source: Websters Dictionary (01 Mar 1998) |
| longitudinal sulcus of heart | See: anterior interventricular groove, posterior interventricular groove. (05 Mar 2000) |