1										2
					3															4
																								5
															6
		7
									8
					9
												10
	11		12														13
								14
			15							16							17
								18											19		20
21

Across 2. irregular heart rate or rhythm 3. procardia, side effects are dizziness, bradycardia, flushing and AV block 7. inhibits movement of calcium ions across cell membranes of cardiac and arterial muscle cells 8. the positive and negative ions move back into their original place 9. stimulation of the _________ nervous system leads to increased heart rate and vasoconstriction 12. may cause the heart muscle to be more sensitive to digitalis 17. the lowest intensity of stimulus that will give rise to a response in a nerve fiber 18. positive ions move from outside the cell into the cell and negative ions move from inside the cell to the outside 21. a side effect of digitalis toxicity

Down 1. heart rate greater than 100 beats per minute 2. Class III antiarrhythmic used to treat life threatening ventricular arrhythmias 4. the most commonly used cardiac glycoside 5. irregular and often rpid ventricular heart rate 6. the brief pause before the next impulse can travel along the nerve fiber 10. used sublingually to releave attacks of angina pectoris 11. this sould be greater than 60 and less than 100 before administering a cardiotonic 13. common calcium channel blocker used to treat hypertention, atrial fibrillation, and paroxysmal SVT 14. drug used to increase the efficiency and improve the contraction of the heart muscle 15. Class II antiarrhythmic used to treat cardiac arrhythmias, angina pectoris, hypertension, and migraine headaches 16. common side effect of nitroglycerin 19. these drugs will increase the force of heart contraction and slow the heart rate 20. acts by relaxing smooth muscle layer of the blood vessel