Study of Ecg Derived Indices Qt and P Wave Dispersion and its Relation to Ventilatory Functions in Chronic Obtrutive Pulmonary Disease Patients

Dr.Naveed Ahmed; Dr .Indla Devasena

Volume : IV, Issue : III, March - 2015

Study of Ecg Derived Indices Qt and P Wave Dispersion and its Relation to Ventilatory Functions in Chronic Obtrutive Pulmonary Disease Patients

Dr. Naveed Ahmed, Dr . Indla Devasena

Abstract :

Chronic obstructive pulmonary disease (COPD) is the fourth leading cause of death, affects more than 10 million people in the United States and about 2.7 million people in India. COPD is highly prevalent disease affecting lungs as well as cardiovascular system. A recent large epidemiologic study revealed increased cardiovascular mortality particularly in patients younger than 65 years with COPD. Previous studies also reported that COPD patients are at increased risk of cardiac arrhythmias. Electrocardiography is the standard method for diagnosing cardiac arrhythmia. QT dispersion (QTd) calculated from 12 lead ECG have been proposed as non invasive predictor of cardiac arrhythmia in COPD patients. The aim of the present study is to evaluate ECG derived indices like QT interval, corrected QT interval, QT dispersion, P wave dispersion in COPD patients and also to correlate QT dispersion and P wave dispersion with various spirometric parameters like FEV1, FEV1/FEV, FEF (25–75). QT dispersion is found to be prolonged in COPD patients both smoker & non smoker groups compared to healthy control group making them vulnerable to develop ventricular arrhythmias and sudden cardiac death due to inhomogenous ventricular repolarisation.P wave duration and P wave dispersion is not much affected