In the above given passage, author has described the movement of the Electrocardiogram (EKG) as the wave of excitation is proceeding from SA node to heart wall with electrical changes. The changes in electrocardiograph were not explained in the above paragraph to unravel the diagnosis of abnormal rhythm.
The following is the order of ventricular depolarization wave follows,
The intrinsic conduction system in the order that a depolarizing impulse travels during a normal heartbeat: from first to last (top to bottom).
Sino-articular node (SA node labelled as “A” in the given figure) -----> internodal pathway,-----> Arterio-ventricular node (AV-node) -----> Arterio-ventricular bundle situated in the septum of the heart --> Bundle of His ------> right and left bundle branches,-----> Purkinje fibers.
Thus, the options (d), (b) and (c) are incorrect.
In the above given passage, author has described the movement of the Electrocardiogram (EKG) as the wave of excitation is proceeding from SA node to heart wall with electrical changes. The changes in electrocardiograph were not explained in the above paragraph to unravel the diagnosis of abnormal rhythm.
Therefore, the correct option is – a. Changes in the ECG are typically used for diagnosis of abnormal cardiac rhythm.