Patients with DCM present with an increase in the QRS duration in the presence of a ventricular conduction block (VCB). However, the clinical spectrum is wide, and it is difficult for physicians to predict which clinical course an individual patient may follow. The prognosis in patients with DCM is poor. Our findings indicate that RBBB and IVCD at admission,but not LBBB, were independent predictors of all-cause mortality in patients with DCM.ĭilated cardiomyopathy (DCM), a leading cause of heart failure and arrhythmia, is a disease of the heart muscle characterized by ventricular dilation and impaired systolic function. The presence of RBBB, IVCD, PASP ≥ 40 mmHg, left atrium diameter and NYHA functional class were independent predictors of all-cause mortality in DCM patients. The all-cause mortality risk was significantly different between the VCB and narrow QRS group (log-rank χ2 = 51.564, P < 0.001). Of those 1119 patients, the all-cause mortality rates were highest in patients with IVCD (47.8, n = 32), intermediate in those with RBBB (32.9, n = 27) and LBBB (27.1 %, n = 60), and lowest in those with narrow QRS (19.9 %, n = 149). The all-cause mortality was assessed using Kaplan-Meier survival curves and Cox regression. This cohort study included 1119 DCM patients with a median follow-up of 34.3 (19.5–60.8) months, patients were then divided into left bundle branch block (LBBB), right bundle branch block (RBBB), intraventricular conduction delays (IVCD) and narrow QRS groups. The purpose of this study was to determine all-cause mortality in patients with DCM and VCB. However, the prognostic implications of VCB patterns in dilated cardiomyopathy (DCM) patients need to be evaluated. The ICD-9-CM is based on the ICD but provides for additional morbidity detail and is annually updated.Ventricular conduction blocks (VCBs) are associated with poor outcomes in patients with known cardiac diseases. Volume 3 (procedures) is used in assigning codes associated with inpatient procedures. can be found at the beginning of the mortality worktable GMWKI.Ī related classification, the International Classification of Diseases, Clinical Modification (ICD-9-CM), is used in assigning codes to diagnoses associated with inpatient, outpatient, and physician office utilization in the U.S. In addition, the most detailed tabulation list of causes used in the U.S. The ICD-9 is no longer available in print. introduced its own classification and coding rules for Human immunodeficiency virus infection (HIV) mortality effective with the 1987 data year (see the Technical Appendix of Vital Statistics of the United States). The years for which causes of death in the United States have been classified by each revision are as follows: Revision To date, there have been 10 revisions of the ICD. The ICD has been revised periodically to incorporate changes in the medical field. The combination of underlying and nonunderlying causes is the multiple causes of death. The single selected cause for tabulation is called the underlying cause of death, and the other reported causes are the nonunderlying causes of death. These coding rules improve the usefulness of mortality statistics by giving preference to certain categories, by consolidating conditions, and by systematically selecting a single cause of death from a reported sequence of conditions. The reported conditions are then translated into medical codes through use of the classification structure and the selection and modification rules contained in the applicable revision of the ICD, published by the World Health Organization. This includes providing a format for reporting causes of death on the death certificate. The International Classification of Diseases (ICD) is designed to promote international comparability in the collection, processing, classification, and presentation of mortality statistics.
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