Effect of Age and Sex on QRS Axis
Deviation of Healthy Indian Population
and Its Clinical Significance
Shiveta Bansal, Assistant Professor Department of Physiology Gian Sagar Medical College, Banur, Patiala, Punjab, India. Ph â€“ 09988221826 E-mail ID: firstname.lastname@example.org
Introduction: Electrocardiogram from 150 apparently healthy adults in the age group of 20â€“80 years, were analyzed using Schiller Cardiovit AT 1,3 channeled ECG machine to study the impact of increasing age and sex on QRS Axis deviation. The mean electrical axis was recorded in frontal plane for QRS complex using the Hexaxial Reference system.
Result: It was observed that there occurred highly significant leftward shift of QRS frontal plane axis with increase in age. This shift of QRS axis was also found on comparison among malesand females of the three groups separately. However there was no significant variation of QRS frontal plane axis with sex in any of three age groups.
Conclusion: It was concluded from the present study that age influences the prevalence of electrocardiographic variations and the diagnostic criterion for abnormality must be based upon the sound understanding of the normal electrocardiogram.
Discussion: The leftward shift of the frontal QRS axis with age was attributed to increased left ventricular wall thickness.