A myocardial infarction is a heart attack; during this, the heart's beat effectively stops and the heart is no longer pumping blood in any useable amount. Therefore, a myocardial infarction causes cardiac output to drop significantly and possibly drop to zero depending on the severity.
Increase in heart rate as Cardiac Output = Heart rate x Stroke volume. As SV will be decreased, HR increases to compensate.
because the force of myocardial contraction weakens
Myocardial ischemia results from the temporary lack of oxygen; if ischemia is prolonged, it could result in permanent damage to the heart muscle. This condition is called myocardial infarction, commonly known as a heart attack.ischemia
Certainly. Decrease cardiac output would mean a decreased in blood flow to the kidneys, which would lead to reduced filtration, therefore urine output.
It increases intrathoracic pressure which decreases venous return to the heart and causes a decrease in cardiac output.
It increases intrathoracic pressure which decreases venous return to the heart and causes a decrease in cardiac output.
Lowers stroke volume
It's decreased ... unless the rate falls, which is the normal cardiac response.
Myocardial infarction (MI) can lead to heart failure in numerous ways. First of all, early on, the heart muscle does not contract well because it is not receiving enough oxygen and other necessary substrates, so stroke volume is decreased, which may lead to congestive heart failure. Later on, if the MI is aborted with thrombolytics or with a cardiac catheterization and thrombectomy, the myocardium may be stunned, or hibernating, because of the lack of oxygen, and may return to normal function over time. If the MI completes, the portion of cardiac muscle that was affected is dead. Depending on how significant a portion that is, losing the muscle alone may result in heart failure. The dead portion of the heart will later turn into a scar, which is noncontractile and also does not allow for the normal stretch, so it may affect preload and contractility in that way as well, decreasing cardiac output and possibly leading to congestive heart failure.
cardiac output :)
cardiac output
10 liters