14 Although it is standard practice to measure the QT interval from the beginning of the QRS complex to the end of the T wave, the actual methods of measurement have not been standardized. Because the QT interval is prolonged at slower heart rates and shortened at faster heart rates, many ...
Conclusion: ECG intervals are prolonged in approximately one third of all patients older than 90 years who present for routine medical care. The presence of coronary artery disease does not appear to have much impact on the ECG intervals. However, mean and median values for the PR, QRS, and...
Following the principle of counterpulsation, the IAB is deflated during systole which coincides with QRS –T interval (R wave always triggers balloon deflation). In this manner balloon inflation during cardiac systole is prevented. The IAB is inflated during diastole, which coincides with T-P int...
14 Although it is standard practice to measure the QT interval from the beginning of the QRS complex to the end of the T wave, the actual methods of measurement have not been standardized. Because the QT interval is prolonged at slower heart rates and shortened at faster heart rates, many ...