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Across 2. High serum calcium 3. Hardening or fibrosis of the arteries 4. A measure of the vascular resistance that the left ventricle must overcome in order to eject blood during contraction 7. Condition of insufficient tissue blood flow 9. Accumulation of fatty deposits in the walls of arteries 11. High serum potassium 12. Low serum postassium 13. Return of the electrical potential across a cell membrane to its resting state following depolarization

Down 1. Recording of electrical activity of the heart 4. Chest pain caused by insufficient blood flow to the heart 5. Decrease in electrical potential across a cell membrane that results in excitation and generation of action potential 6. Method of dosage with cardiac glycosides that rapidly produces effective drug levels 8. The muscular layer of the heart 10. Refers to the venous return and the amount of blood returning to the heart that must be pumped