| P-R | the time between the P wave and the beginning of the QRS complex in electrocardiography [interval] |
|---|---|
| PTC | papillary thyroid carcinoma; percutaneous transhepatic cholangiography; phase transfer catalyst; phe... |
| QRS-ST | the junction between the QRS complex and the ST segment in the electrocardiogram [junction] |
| Q-T | in electrocardiography, the time from the beginning of the QRS complex to the end of the T wave [int... |
| R' | in electrocardiography, the second positive deflection during the QRS complex |