Stepwise Approach In ECG Interpretation Using Vector Concepts Involved In Cardiac Vector Theory

Abstract

INTRODUCTION: Electrocardiogram (ECG) is one of the most important diagnostic tool for diagnosis of coronary artery disease yet its interpretation remains an arduous task creating  ECG phobia among some of the junior  medical staffs. Einthoven used  vector concepts to explain the  electrical activity of the heart even before a century but never published a complete detailed description. Many researchers attempted to solve this problem but resulted in vain. Cardiac vector theory and its application in ECG interpretation was proposed and explained in detail  by Rajini Samuel (current author) in the previous research articles.

AIM: The aim of the current research study is to develop a 7 stepwise approach in ECG interpretation using cardiac vector theory concepts to understand and interpret most of the common cardiac conditions.

MATERIALS AND METHODS:  The deviation of  cardiac vector  and representation of resultant  cardiac wave vector in the form of circles  are applied using the vector physics principle. A stepwise approach in ECG interpretation using cardiac vector concept was formulated.

RESULTS: Cardiac circles were constructed using MATLAB software using the well known relationship between Bipolar and Unipolar Limb Leads.The changes in the resultant cardiac vector in various clinical conditions were tabulated and depicted in figures.

CONCLUSION: This stepwise approach in ECG interpretation using cardiac vector theory concepts may help the junior medical staffs to  interpret  the ECG findings of most of the common cardiac conditions efficiently, easily and quickly resulting in saving innumerable heart patients.