The main causes of left ventricular heart dysfunction are related to systolic and diastolic failures. In these types of failures, the pumping ability of the left ventricle is affected. In systolic failure, the left ventricle is unable to contract properly, and the left ventricle muscles are not sufficiently relaxed in diastolic failure, notes the American Heart Association.
The left ventricle is an important structure of the heart because it is responsible for pumping blood throughout the body. With systolic failure, the left ventricle muscle does not have enough pumping power due to abnormal muscle contraction. When this occurs, the left ventricle does not have sufficient force to pump out enough blood into the circulatory system. In the case of diastolic failure, the ventricle muscle may stiffen and not be able to relax sufficiently during the resting phase between heartbeats. This can lead to the left ventricle chamber's inability to fill up with blood properly, states the University of California San Francisco Medical Center.
Both these types of left ventricle dysfunctions can lead to heart failure. Some symptoms of heart failure include ascites, edema, breathing difficulties, heartbeat abnormalities, fatigue and chronic cough, according to Mayo Clinic. A symptom such as shortness of breath, can be attributed to fluid backup in the lungs. When there is left ventricle dysfunction, the heart may become enlarged in an attempt to compensate for the left ventricle's inability to work properly.