Which is the correct path of an electrical excitation from the pacemaker to a cardiomyocyte in the left ventricle (LV)?
A) Sinoatrial (SA)node → atrioventricular (AV)bundle → atrioventricular (AV)node → Subendothelial conducting network → cardiomyocyte in LV
B) Atrioventricular (AV)node → subendothelial conducting network → atrioventricular (AV)bundle → sinoatrial (SA)node → cardiomyocyte in LV
C) Atrioventricular (AV)node → sinoatrial (SA)node → atrioventricular (AV)bundle → Subendothelial conducting network → cardiomyocyte in LV
D) Sinoatrial (SA)node → atrioventricular (AV)node → atrioventricular (AV)bundle → Subendothelial conducting network → cardiomyocyte in LV
E) Sinoatrial (SA)node → atrioventricular (AV)node → Subendothelial conducting network → atrioventricular (AV)bundle → cardiomyocyte in LV

Question

Quizplus · Accepted Answer

The correct path of an electrical excitation from the pacemaker (SA node) to a cardiomyocyte in the left ventricle is through the atrioventricular (AV) node, which is located between the atria and ventricles. From the AV node, the electrical signal travels down the AV bundle (also known as the Bundle of His) and then through the subendocardial conducting network (also known as the Purkinje fibers) to reach the cardiomyocytes in the left ventricle. Option D is the only choice that correctly follows this pathway.

Which Is the Correct Path of an Electrical Excitation from the Pacemaker