Question

Low voltage of the QRS complex throughout the electrocardiogram is often found in:

A. Constrictive pericarditis
B. Mitral stenosis
C. Pericardial effusion
D. Pleural effusion

Answer 1

A low voltage of the QRS complex throughout the electrocardiogram can be found in constrictive pericarditis, pericardial effusion, and pleural effusion.

Step-by-step explanation:

A low voltage of the QRS complex throughout the electrocardiogram (ECG) can be found in several conditions, including:

1. Constrictive pericarditis: This is a condition where the pericardium (the sac surrounding the heart) becomes thickened and rigid, limiting the ability of the heart to contract properly.
2. Pericardial effusion: This occurs when fluid accumulates in the pericardial sac, compressing the heart and reducing the amplitude of the QRS complex.
3. Pleural effusion: Although not directly related to the heart, a large pleural effusion (fluid in the space around the lungs) can cause the heart to be compressed, resulting in a low voltage QRS complex on the ECG.

It is important to note that a low voltage QRS complex alone is not specific to any one condition and should be interpreted in conjunction with other clinical findings.