Question

If a reduced oxygen supply weakens the heart cells but does not actually kill them

Answer 1

yes it is true because when there will be normal oxygen supply the cell will start working properly . there is already some amount of oxygen left in heart cells which doesn't get the cells to kill.

Answer 2

Ischemia a reduced oxygen supply weakens the heart cells but does not actually kill them .

• Ischemia or ischemia, limits the blood supply to a tissue,muscle group, or organ in the body, causing a lack of oxygen  needed for cell metabolism (to maintain tissue lifespan).
• Ischemia is usually caused by tissue damage or dysfunction,vascular problems leading to  hypoxia and microvascular dysfunction.It also refers to localized hypoxia in a specific part of the body, sometimes caused by constriction (such as vasoconstriction, thrombosis, or embolism).
• Ischemia involves a lack of oxygen as well as reduced availability of nutrients and improper disposal of metabolic wastes. Ischemia can be partial (poor perfusion) or complete blockage.
• For example; patients with myocardial ischemia are prescribed drugs that decrease chronotropy and ionotropy so that blood flow to the heart is reduced and  the new level of blood delivery provided by the stenosis is adequate.