最近,来自于大连医科大学附属第一医院的研究发表于Journal of Cardiovascular Electrophysiology,为LBBB患者提供了一个简便的QT间期计算公式QT-LBBB = QTLBBB – (0.86 * QRSLBBB – 71)。该研究在心内电生理检查时行右室心尖部起搏模拟...
New formula for evaluation of the QT interval in patients with left bundle branch blockQT IntervalLeft Bundle-Branch BlockProlonged QT IntervalQT prolongationBACKGROUND Left bundle branch block (LBBB) and QT prolongation both are associated with a worse prognosis. LBBB lengthens the QT interval. To...
A New QT Formula for LBBB. Introduction: QT prolongation is an independent risk factor forcardiac mortality. Left bundle branch block (LBBB) is more common in patients as they age. Widening ofthe QRS in LBBB causes false QT prolongation and thus makes true QT assessment difficult. We aimed t...
LBBB/RBBB: Left or right bundle branch block; MDRD: Modification of diet in renal disease; OR: Odds ratios; QT-DDI: QT drug-drug interaction; ROC: Receiver operating characteristics; SPSS: Statistical package for social science; SD: Standard deviation; TdP: Torsade de pointes; VR: Ventricular...
Other observed abnormalities in ECG including LBBB, RBBB, LAHB, LPHB, PAC, and PVC were significantly higher in the deceased group. The presence of abnormalities in the ECG of the patient is an alarm signal of survival outcome and requires eliminating the causes such as electrolyte disorder, ...
In addition, owing to the nature of our cohort- a normal adults' population- we applied Bazett correction formula, which is shown to yield a consistent result at the range of heart rates encountered in healthy adults at r est51; (4) We could not assess the common causes of acquired ...
heart failureleft bundle brunch blockQT intervalJT intervalQT prolongationlong QTBackground: The presence of left bundle branch block (LBBB) due to right ventricular pacing represents a particular challenge in properly measuring the QTc interval. In 2014, a new formula for the evaluation of QT ...
Left bundle branch block (LBBB) is more common in patients as they age. Widening of the QRS in LBBB causes false QT prolongation and thus makes true QT assessment difficult. We aimed to develop a simple formula to achieve a good estimate of the QT interval in the presence of LBBB. ...
QT formulaQT intervalQT prolongationBackground: The evaluation of the QT interval in the presence of left bundle branch block (LBBB) is associated with the challenge to discriminate native QT interval from the prolongation due to the increase in QRS duration. The newest formula to evaluate QT ...
QT prolongationright bundle‐branch blocksudden deathA 79‐year‐old woman presented with palpitations and atrial fibrillation (AF) with a left bundle‐branch block (LBBB; Figure 1). AF sustained for a few hours based on the medical interview. QT and QTc (Bazett's formula, 10‐beat average ...