RA

• radial artery;

• radioactive;

• radiographic abstraction;

• radiographic absorptiometry;

• ragocyte;

• ragweed antigen;

• rapidly adapting [receptors];

• reactive arthritis;

• reciprocal asymmetrical;

• refractory anemia;

• refractory ascites;

• regression analysis;

• renal artery;

• renin-angiotensin;

• repeat action;

• residual air;

• retinoic acid;

• rheumatoid arthritis;

• right angle;

• right arm;

• right atrium;

• right auricle;

• risk adjustment;

• risk assessment;

• rotation angiography;

• Roy adaptation [model]

• airway resistance