The heart has an internal electrical system that controls the rhythm of the heartbeat. Problems can cause abnormal heart rhythms, called arrhythmias. There are many types of arrhythmia. During an arrhythmia, the heart can beat too fast, too slow, or it can stop beating. Sudden cardiac arrest (SCA) occurs when the heart develops an arrhythmia that causes it to stop beating. This is different than a heart attack, where the heart usually continues to beat but blood flow to the heart is blocked.
There are many possible causes of SCA. They include coronary heart disease, physical stress, and some inherited disorders. Sometimes there is no known cause for the SCA.
Without medical attention, the person will die within a few minutes. People are less likely to die if they have early defibrillation. Defibrillation sends an electric shock to restore the heart rhythm to normal. You should give cardiopulmonary resuscitation (CPR) to a person having SCA until defibrillation can be done.
If you have had an SCA, an implantable cardiac defibrillator (ICD) reduces the chance of dying from a second SCA.
NIH: National Heart, Lung, and Blood Institute
No, a cardiac arrest is different from a heart attack due to its pathophysiology. Often people use these terms interchangeably, but they are not synonymous. A heart attack occurs when blood flow to the heart is blocked by the plaque in the arteries and a cardiac arrest occurs when the heart suddenly and unexpectedly stops beating. A heart attack is commonly referred to a circulation problem while a cardiac arrest is an electrical problem. While these two heart conditions are different, they are connected to one another. A sudden cardiac arrest can occur after a heart attack or when one is recovering from a heart attack. Usually, after a heart attack, patients would be given aspirin and other antiplatelet agents and taken to the cardiac catheterization lab for imaging and possible percutaneous coronary intervention. Treatment for cardiac arrest is a little different as you would want to start CPR immediately and defibrillate the patient with an automatic external defibrillator if their rhythm was shockable. While sudden cardiac death isn't a common consequence of a heart attack, having a heart attack does increase your risk for sudden cardiac death and if some are having cardiac arrest would be most likely preceded by a heart attack. References 1. Heart Attack or Sudden Cardiac Arrest: How Are They Different? American Heart Association, 19 Sept. 2016. URL: www.heart.org/HEARTORG/Conditions/HeartAttack/AboutHeartAttacks/Heart-Attack-or-Sudden-Cardiac-Arrest-How-Are-They-Different_UCM_440804_Article.jsp#.WqVf8mXnvNU. Accessed March 16, 2018
Before I answer your question, I would like to say that I have a background in Pharmaceutical chemistry and I am not a doctor. To be absolutely sure, please consult a cardiologist. Based on your question, I did research and found that Celepid is a milky-white emulsion of soybean oil-in-water, and is used as a source of concentrated energy as well as to counter the essential fatty acid deficiencies in critically ill patients. The dull and drowsy condition cannot occur with Celepid. There may be some other health issue with your father. Consult a cardiologist, regarding the present health issues.