2/28/2023 0 Comments Ivcd for mac download![]() ![]() In a population study, left anterior hemiblock (LAHB) was associated with cardiac morbidity and mortality ( 8), while other authors consider LAHB in a healthy population as an incidental ECG finding ( 12). Previous authors found no increased overall mortality in RBBB in the absence of clinically overt cardiac disease ( 11). In a recent population study, right bundle branch block (RBBB) was associated with increased CV risk and all-cause mortality, whereas incomplete RBBB (IRBBB) was not ( 10). However, there is no consensus on LBBB-related prognosis in general populations ( 9). LBBB may also be a marker of structural heart disease, especially dilated cardiomyopathy ( 7, 8). In several studies on chronic and acute coronary artery disease, left bundle branch block (LBBB) was found to be an excellent predictor of mortality and future clinical events ( 5, 6). Accordingly, the prognostic implications of IVCDs depend on the category of conduction disturbance and on the population studied. In studies performed in healthy populations, findings about future cardiovascular (CV) events have not been consistent ( 3, 4). The epidemiological data have mostly been derived from hospitalized patients with findings partly dependent on the characteristics of the patient cohort ( 2). ![]() Published data regarding the clinical and prognostic significance of intraventricular conduction delays (IVCD) are highly varied. In the early days of electrocardiography (ECG), it was noticed that subjects with wide QRS could live decades without remarkable symptoms ( 1). RBBB did not have an impact on cardiovascular mortality either in subjects with or without previous heart disease. ![]() In the general population, non-specific IVCD, LBBB, and IRBBB were associated with increased relative risk for all-cause and cardiovascular mortality. Right bundle branch block (RBBB) was not related to additional mortality, while incomplete RBBB (IRBBB) presented a hazard ratio of 2.24 (95% CI 1.064–4.77, P = 0.036).Ĭonclusions. In Cox regression analysis after adjustment for age and gender, the hazard ratio for cardiovascular mortality for non-specific IVCD was 4.25 (95% confidence interval 1.95–9.26, P < 0.0001) and for left bundle branch block (LBBB) 2.11 (95% CI 1.31–3.41, P = 0.002). For both sexes, all-cause and cardiovascular mortality was higher in subjects with IVCD than in those without. During a mean 8.2 years (interquartile range 8.1 to 8.3) of follow-up 640 subjects died (10.2%) 277 (4.4%) were cardiovascular deaths. Data were collected from 6299 Finnish individuals. We examined the prognostic impact of eight different intraventricular conduction delays (IVCD) in the standard electrocardiogram (ECG) in a community cohort. ![]()
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