A community health nurse is teaching a class on the effects of heart injury. Which statement from class attendees indicates an appropriate understanding of the course material?
A) "When my heart cells are deprived of oxygen, irreversible damage occurs."
B) "My heart cells may fully recover if blood supply returns within 15 minutes."
C) "When my heart cells sustain an injury, they can no longer function normally."
D) "Even if my heart cells die, the damage to my heart is still reversible."
B) "My heart cells may fully recover if blood supply returns within 15 minutes."
Explanation: A) Myocardial cells have the ability to fully recover, even if their blood supply is restricted, as long as blood supply is not compromised for longer than 10 to 15 minutes. Irreversible damage does not occur when myocardial cells are deprived of oxygen for a shorter duration of time. When heart cells sustain an injury, irreversible damage does not occur unless sustained oxidative stress occurs. If myocardial cells die, the damage to the heart is irreversible.
B) Myocardial cells have the ability to fully recover, even if their blood supply is restricted, as long as blood supply is not compromised for longer than 10 to 15 minutes. Irreversible damage does not occur when myocardial cells are deprived of oxygen for a shorter duration of time. When heart cells sustain an injury, irreversible damage does not occur unless sustained oxidative stress occurs. If myocardial cells die, the damage to the heart is irreversible.
C) Myocardial cells have the ability to fully recover, even if their blood supply is restricted, as long as blood supply is not compromised for longer than 10 to 15 minutes. Irreversible damage does not occur when myocardial cells are deprived of oxygen for a shorter duration of time. When heart cells sustain an injury, irreversible damage does not occur unless sustained oxidative stress occurs. If myocardial cells die, the damage to the heart is irreversible.
D) Myocardial cells have the ability to fully recover, even if their blood supply is restricted, as long as blood supply is not compromised for longer than 10 to 15 minutes. Irreversible damage does not occur when myocardial cells are deprived of oxygen for a shorter duration of time. When heart cells sustain an injury, irreversible damage does not occur unless sustained oxidative stress occurs. If myocardial cells die, the damage to the heart is irreversible.
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