What EKG finding is commonly seen in dilated cardiomyopathy?

What EKG finding is commonly seen in dilated cardiomyopathy?

• A. Peaked T waves
• B. Short QT interval
• C. No abnormalities
• D. Nonspecific ST-T changes with Left Bundle Branch Block

Answer: (D)

In dilated cardiomyopathy, the heart undergoes dilation and systolic dysfunction, and the conduction system can become affected as the ventricle remodels. This often translates to changes on the ECG that include conduction abnormalities—most commonly Left Bundle Branch Block—and nonspecific repolarization abnormalities reflected as nonspecific ST-T changes. The combination of nonspecific ST-T changes with Left Bundle Branch Block is a pattern you can see in dilated cardiomyopathy because the dilated, scar-prone ventricle disrupts normal conduction and alters repolarization across multiple leads. It captures both a conduction delay and the global, non-specific repolarization disturbances that accompany the structural changes in DCM. Peaked T waves point more toward conditions like hyperkalemia, where the T waves become tall and narrow. A short QT interval suggests electrolyte disturbances or certain genetic syndromes, not typically a hallmark of dilated cardiomyopathy. The idea of no abnormalities is unlikely in DCM, since the structural disease frequently produces recognizable changes on ECG, especially conduction delays such as Left Bundle Branch Block.

In dilated cardiomyopathy, the heart undergoes dilation and systolic dysfunction, and the conduction system can become affected as the ventricle remodels. This often translates to changes on the ECG that include conduction abnormalities—most commonly Left Bundle Branch Block—and nonspecific repolarization abnormalities reflected as nonspecific ST-T changes.

The combination of nonspecific ST-T changes with Left Bundle Branch Block is a pattern you can see in dilated cardiomyopathy because the dilated, scar-prone ventricle disrupts normal conduction and alters repolarization across multiple leads. It captures both a conduction delay and the global, non-specific repolarization disturbances that accompany the structural changes in DCM.

Peaked T waves point more toward conditions like hyperkalemia, where the T waves become tall and narrow. A short QT interval suggests electrolyte disturbances or certain genetic syndromes, not typically a hallmark of dilated cardiomyopathy. The idea of no abnormalities is unlikely in DCM, since the structural disease frequently produces recognizable changes on ECG, especially conduction delays such as Left Bundle Branch Block.