Left bundle-branch block also weakly predicted arrhythmic death (P=0.04), but right bundle-branch block was not associated with increased mortality. Subjects with intraventricular conduction delay had increased all-cause mortality (RR 2.01 CI 1.52-2.66 P<0.001), increased cardiac mortality (RR 2.53 CI 1.64-3.90 P<0.001), and an elevated risk of arrhythmic death (RR 3.11 CI 1.74-5.54 P=0.001). With complete bundle branch blocks, the QRS interval is classically stated to be greater than or equal to 120 ms (0.12 s) in duration (three small 40 ms box widths on standard ECG displays) with incomplete blocks, the QRS interval is defined between 100 (or 110 by computer) and 120 ms (0.10 or 0.11 by computer to 0.12 s). Prolonged QRS duration predicted all-cause mortality (multivariate-adjusted relative risk 1.48 95% confidence interval 1.22-1.81 P<0.001), cardiac mortality (RR 1.94 CI 1.44-2.63 P<0.001), and sudden arrhythmic death (RR 2.14 CI 1.38-3.33 P=0.002). QRS duration ≥110 ms was present in 1.3% (n=147) and intraventricular conduction delay in 0.6% (n=67) of the subjects. IVCD Nonspecific Intraventricular Conduction Delay Nonspecific Intraventricular Conduction Delay by EKG Finding Definition An electrocardiographic finding of a widened QRS duration typically greater than 110 ms which does not meet the morphologic criteria for any of the standard bundle branch or fascicular block patterns. Prolonged QRS duration was defined as QRS ≥110 ms and intraventricular conduction delay as QRS ≥110 ms, without the criteria of complete or incomplete bundle-branch block. QRS duration > 100 ms in the presence of a supraventricular rhythm. Primary end points were all-cause mortality, cardiac mortality, and arrhythmic death. We evaluated the 12-lead ECGs of 10 899 Finnish middle-aged subjects from the general population (52% of whom were men mean age 44☘.5 years) between 19 and followed them for 30☑1 years. There are some rare conditions like Wolf-Parkinson-White syndrome that can also cause QRS to appear wider but they have other signs that the doctor would recognise. Cardiac resynchronization therapy-defibrillator (CRT-D) implantation is associated with improvements in heart failure (HF) symptoms and all-cause mortality in patients with symptomatic HF, prolonged QRS duration (QRSd), and left ventricular ejection fraction (EF) 35. In particular, there is a paucity of data on the prognostic significance of nonspecific intraventricular conduction delay in apparently healthy subjects. In your case it doesnt show a particular BBB pattern, rather a non-specific one, although its probably a similar process. Prolonged duration of QRS complex in a 12-lead ECG is associated with adverse prognosis in patients with cardiac disease, but its significance is not well established in the general population.

Non specific qrs widening ivcd