Normally, when a weakened heart tries to compensate for increased necessities resulting from cardiac diseases, it is forced to pump more strongly. As a result, the heart muscle enlarges, in addition to growing thicker and stronger. Changes in cardiac structure result into inability of left and right halves of heart to contract in a coordinated manner.

The heart muscle gradually shrinks and creates a connective tissue that delays conduction of electrical excitations as a result of the rhythm disturbances.  In instances where the heartbeat gets irregular in some instances, the heart’s’ pumping ability reduces and so does the supply of blood and oxygen to other parts of the body.

Existing researches reveal that more than a third of cardiac failure patients are faced with either rapid or lowered cardiac rhythm disturbances. Private ECG examinations are often used to display a broadened curve complex as well as an altered curve shape that are diagnosed by medical practitioners as left bundle branch block.

The condition also results when the left ventricle does fails to contract with sufficient pace or coordination. A number of regions of left ventricle might complete contraction process, while leaving others areas which might not have even started contracting. These non-uniform contractions of heart chambers result into blood’s swinging motion in heart chambers and reduce pumping ability of heart and hence output.

Patients suffering from disturbed stimulus conduction largely benefits from cardiac resynchronisation therapy (CRT) system installation. The CRT system harmonizes interaction of both heart chambers through constant delivery of electrical pulses. The heart as a result no longer controls pumping motion of its chambers. This process is handed over to an artificially controlled CRT device. The regulated interaction of heart chambers allow them to contract synchronously and hence enhance the heart’s pumping.