Which ECG change best differentiates left ventricular hypertrophy from simple increased cardiac workload without structural enlargement?
Increased QRS voltage with secondary ST–T changes
Left ventricular hypertrophy is defined on the ECG not merely by higher voltage but by increased QRS voltage accompanied by secondary ST–T changes — a down-sloping ST depression and T-wave inversion in the leads with the tall R waves ('LV strain pattern') — reflecting true structural hypertrophy rather than functional overload alone.
Uniform ST depression without voltage change, isolated PR prolongation and axis deviation with normal QRS amplitude do not distinguish structural hypertrophy from mere increased workload.
Hence, Increased QRS voltage with secondary ST–T changes.
Similar Questions
Tall, peaked P waves on ECG are most commonly associated with:
What is the main purpose of the Einthoven triangle in electrophysiology?
What does the QT interval on a normal ECG primarily represent?
A patient presents with muscle weakness, and the ECG shows flattened T waves and prominent U waves. Which electrolyte imbalance is most probable?
Sinus bradycardia is associated with:
ST elevation in leads V1 to V4 most commonly indicates infarction of which wall of the heart?
During ECG machine calibration, what is the standard voltage signal used to check the sensitivity?
Which component of the ECG lead system is responsible for detecting electrical impulses from the heart?
Left ventricular hypertrophy on ECG is commonly indicated by:
How many standard limb leads are used in a basic ECG procedure?
Important Questions from Basic Cardiovascular Investigations
Tall, peaked P waves on ECG are most commonly associated with:
What is the main purpose of the Einthoven triangle in electrophysiology?
What does the QT interval on a normal ECG primarily represent?
A patient presents with muscle weakness, and the ECG shows flattened T waves and prominent U waves. Which electrolyte imbalance is most probable?
Sinus bradycardia is associated with:
