Question

Which is the correct location of Atrio ventricular node?

(a) upper part of the heart wall between the two atrial

(b) lower part of the heart wall above the two atrial

(c) upper part of the heart wall above the two atrial

(d) lower part of the heart wall between the two atrial

This question was addressed to me in homework.

This interesting question is from Biotelemetry Application on Wimax Networks in chapter Biomedical Telemetry of Biomedical Instrumentation

Answer 1

Right answer is (d) lower part of the heart wall between the two atrial

The best I can explain: The AV node delays the spread of excitation for about 0.12s, due to the presence of a fibrous barrier of non-excitable cells that effectively prevent its propagation from continuing beyond the limits of stria.  The AV node is located in the lower part of the wall between the two atria.