| QRS | in electrocardiography, the complex consisting of Q, R, and S waves, corresponding to depolarization of ventricles [complex]; in electrocardiography, the loop traced by QRS vectors, representing ventricular depolarization [interval] |
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| QRS-ST | the junction between the QRS complex and the ST segment in the electrocardiogram [junction] |
| QRS-T | the angle between the QRS and T vectors in vectorcardiography [angle] |
| ECG | Electro-Cardio-Graphy(-Gram); 심전도 = EKG 1. Conducting System Structu... |
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| P-R | the time between the P wave and the beginning of the QRS complex in electrocardiography [interval] |
| 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 |