Two chemical compounds can be used to create a heart attack in anyone, while leaving no trace of a crime:
Potassium Chloride:
Potassium Chloride is known to be among the ingredients in many prescription drugs, such as: Klor-Con, Klor-Con 8, Klor-Con 10, and Klor-Con/25, among others. Potassium Chloride breaks down into both its’ individual components, potassium and chlorine. Both are found in the human body and the presence of either or both of these will not raise suspicion by either the attending physician or the coroner, who will carry out the autopsy.
This compound breaks down into both potassium and chlorine, in which the chlorine (Cl) binds with the human body’s naturally occurring sodium (Na) to create NaCl — sodium chloride — common table salt. The resultant heart attack is found to have no known cause — as all that is found in the body is a slightly elevated level of NaCl. Too much potassium in the body causes tachycardia (fast heart-rate), which then leads to something known as ventricular fibrillation, which is one of many types of cardiac arrest.
Calcium Gluconate:
Calcium Gluconate is available in a 10% hypertonic I.V. (intravenous) solution, which simply means that the concentration is higher than what normally appears in the human body. The process by which this works is known as osmosis — the hypertonic solution removes the water and glucose from the body’s cells — replacing it with Calcium Gluconate. The calcium and the glucose are deposited in the body to be used as energy/fuel. The glucose is used for fuel, while the calcium remains in the body.
The Calcium Gluconate removes chlorine and replaces it with calcium, thus creating an electrolytic imbalance. The three compounds that become imbalanced are sodium (Na), potassium (K), and chlorine (Cl). This interferes with the normal LUB-DUB heartbeat impulse, which can then be regulated either too fast or too slow, creating a heart attack.
Actually it is the excess potassium that stops the heart. Hyperkalemia is inducted with excess potassium delivered by the IV route and it is difficult, very difficult to discern with a postmortem sample.