OBJECTIVE To investigate the differences in four formulae for heart rate correction of the QT interval in serial ECG recordings in healthy children undergoing a graded exercise test. SUBJECTS 54 healthy children, median age 9.9 years (range 5.05–14.9 years), subjected to graded physical exercise ...
Cumulative Experience of Azimilide-Associated Torsades de Pointes Ventricular Tachycardia in the 19 Clinical Studies Comprising the Azimilide Database Forty-three percent of TdP patients had a QT interval corrected by Bazett's formula, for heart rate, (QTc) 鈮 500 ms at the time of or before ...
OBJECTIVE To investigate the differences in four formulae for heart rate correction of the QT interval in serial ECG recordings in healthy children undergo... A Benatar,T Decraene - 《Heart Official Journal of the British Cardiac Society》 被引量: 81发表: 2001年 加载更多来源...
Duration of the QT interval naturally varies inversely with heart rate; hence, a corrected QT (QTc) that is adjusted for heart rate is most predictive of proarrhythmic potential.1-3 The QTc is widely used in clinical practice. However, key aspects of QTc monitoring lack standardization in ...
In regards to the heart rhythm what is the physiological significance of the P-R and QRS intervals? What is ECG ? What's cellular respiration? What are the different types of mass movements? Explain the electrical activity of the heart during a heartbeat. ...
In such cases, the aortic valve area calculator, based on the continuity equation, may be a better option. There are several methods of measuring the above hemodynamic parameters; for example: ECG (heart rate), echocardiogram, CT scan, or cardiac catheterization. Mitral stenosis grading Mitral ...
The former interferes with glucose tolerance and the latter can obscure symptoms of hypoglycemia Calcium and B receptor blockers should not be used for heart failure 18, digitalis Digitalis: Center of gravity, atrial fibrillation, busy For moderate and severe systolic heart failure, the rate of ...
(new contents, assistant does not test) Young middle-aged patients + paroxysmal palpitation + sudden dash +ECG (QRS wave, chamber type + no obvious P wave) = paroxysmal supraventricular tachycardia (ten) coronary heart disease In elderly patients with history of smoking + + + chest pain 30 ...
The ICH E14 guidance document uses the Bazett formula for reporting of cardio-dynamic and safety ECG data in clinical trials. While there is substantial familiarity with the Bazett (QTcB) formula (QT/(RR) 1/2), the Fridericia (QTcF) formula (QT/(RR) 1/3 ) is preferred in the cancer ...
Calcium carbonate is used therapeutically as a phosphate buffer in hemodialysis, as an antacid in gastric hyperacidity for temporary relief of indigestion and heartburn, and as a calcium supplement for preventing and treating osteoporosis. (NCI04)|Carbonic acid calcium salt (CaCO3). An odorless, ...