Myocardial Infarction and the effect on fluid and electrolyte imbalances- HELP!!!

  1. myocardial infarction and the effect on fluid and electrolyte imbalances
    :spin: hello to anyone and everyone who can help me! i am a nursing student currently undertaking a case study looking at a client experiencing a myocardial infarction. now, the question i pose is how does the myocardial infarction effect the fluid and electolyte balances and why is it an important diagnosis/intervention following a mi? also, what would be critial nursing interventions for dealing with fluid and electrolyte imbalances relating to mi's? what makes these intervention critical? i have researched this topic extensively but am having alot of trouble identifying clear examples and reasons for this imbalance. it is quite a confusing subject and would greatly appreciate any assistance with this !!!! thankyou for you help... hope to hear some advice soon!- regards- claire :spin:
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    About claire20

    Joined: Mar '06; Posts: 3


  3. by   carachel2
    I think your teachers are wanting you to look at the effect of myocardial damage on the pumping ability of the heart and the sequelae of events that would follow decreased pumping ability. MI ==>damaged heart muscle ==>lowered ejection fraction ==>decreased blood pumping out==>kidneys can "sense" the reduction in flow and all of the compensatory mechanisms are initiated. The renin-angiotensin-aldosterone system comes into play==>body conserves fluid in an attempt to increase the total volume.

    These compensatory mechanisms work fine in the short run, but after awhile this increase in total volume puts an even greater workload on the heart and leads to congestive heart failure. You should focus your research on the electrolytes involved in these processes (Na, K. etc.)

    Also, realize that an acute loss of blood supply to the cardiac muscle causes rapid depletion of potassium from the ischemic musculature (from Guyton textbook of Phys.), this increases potassium in the extracellular fluids surrounding the cardiac muscle fibers and in turn increases the irritability of the heart.
  4. by   claire20
    Thankyou SO MUCH for those of you who replied... you truly are a huge help! :spin: