| PACE | Pacing and Clinical Electrophysiology; paired basic amino acid cleaving enzyme; personalized aerobic... |
|---|---|
| RA | radioactive; ragocyte; ragweed antigen; rapidly adapting [receptors]; reactive arthritis; reciprocal... |
| RAA | renin-angiotensin-aldosterone [system] |
| RAAS | renin-angiotensin-aldosterone system |
| RAS | rapid atrial stimulation; recurrent aphthous stomatitis; reflex activating stimulus; reliability, av... |