Match the electrolyte imbalances to their descriptions A. Hypocalcemia B. Hyperkalemia c. Hypokalemia D. Hypercalcemia 1. too little calcium in the blood 2. too much potassium in the blood 3. can contribute to heart block and cardiac arrest 4. too much calcium in the blood 5. can cause feeble heart rate and arrhythmia 5. increases the heart rate and contractility (force) .