I44: Atrioventricular and left bundle-branch block
I44.7: Left bundle-branch block, unspecified
The heart pumps blood through the body. Inside the heart are 4 chambers. There are 2 heart atria and 2 ventricles. Both heart atria and both ventricles are separated from each other by a partition. The heart's electrical currents flow within the heart. The heart's electrical activity causes the heart muscle to contract. It begins at a site in your right atrium. Initially the electrical activity spreads to both atria. The electrical activity then flows on via a sort of cable to the ventricles. The heart’s electrical impulses make the atria, and then the ventricles, contract. To achieve this, the cable which they flow through divides up into several thin cables. There are 2 cables for the left ventricle and one cable for the right ventricle.
Your heart’s electrical impulses are not flowing, or not fully flowing, through the cables for the left ventricle. If the impulses stop flowing through the cables, they spread to the ventricles in other ways.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.