Myocardial ischemia can also cause serious abnormal heart rhythms. High-impact journals are those considered to be important in their respective fields. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of comparable kind. It reflects the typical number of citations to recent articles published in science and science journals during a particular year or period, and is usually used as a proxy for the relative significance of a journal within its field. It is first devised by Eugene Garfield, the founding father of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the amount of current year citations to the source items published therein journal during the previous two years. Myocardial ischemia occurs when blood flow to your heart is reduced, preventing the heart muscle from receiving enough oxygen. The reduced blood flow is usually the result of a partial or complete blockage of your heart's arteries (coronary arteries). Myocardial ischemia, also called cardiac ischemia, reduces the heart muscle's ability to pump blood. A sudden, severe blockage of one of the heart's artery can lead to a heart attack. Myocardial ischemia might also cause serious abnormal heart rhythms. Treatment for myocardial ischemia involves improving blood flow to the heart muscle. Treatment may include medications, a procedure to open blocked arteries (angioplasty) or bypass surgery. Myocardial ischemia occurs when the blood flow through one or more of your coronary arteries is decreased.