Amiodarone cardiac stimulants cardiac treating

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ed vision , night blindness CNS – headache • Most Toxic: – low BP – respiratory depression, respiratory arrest – low temperature Contraindications or Cautions Contraindications • • • • complete A-V block cardiac failure allergy to drug or idiosyncracy due to anticholinergic properties – caution glaucoma, urinary retention • Serum potassium must be normal – hypokalemia decreases drug effectiveness – hyperkalemia increases it Other Antiarrhythmics Other • You should know: – – – – Quinidine Lidocaine Beta Blockers Calcium channel blockers • Others will not be tested: 5 Mexiletine 7 Flecanide 10 Amiodarone Cardiac Stimulants Cardiac Treating Arrhythmias that are slow • Therapy is only a temporary measure – heart starts – electrical pacemaker fitted (overcome A-V block) • Mechanism of Action – Adrenergic Agents - Stimulates β activity of heart • Epinephrine (α & β agonist) • Isoproterenol (β agonist) - can be given orally or sublingually – Anticholinergic Agents – • blocks muscarinic slowing Therapeutic Uses Therapeutic Cardiac Stimulants – For most therapeutic uses try adrenergic agonist • • • • Cardiac arrest Hypotensive crisis A-V block Bradycardia – For bradycardia, chiefly use anticholinergic agent Side Effects Side Cardiac Stimulants • Not crucial - drug used acutely Toxic Effects Toxic Cardiac Stimulants • Heart – palpitations, tachycardia, ventricular arrhythmias • CN S – headache, fear, anxiety, restlessness • BP – may rise alarmingly Contraindications Contraindications Cardiac Stimulants • Not for chronic use – makes heart work too hard and increases its O2 use • Congestive heart failure • Angina pectoris • High blood pressure …Unless cardiac arrest Angina Pectoris: Angina Treating Heart Pain Heart Pain caused by mismatch of oxygen supply vs. oxygen demand • Often think of coronary arteries… Why? Chen, H.S. V. et al. N Engl J Med 2003;349:1e No Caption Found Angina Pectoris: Angina Heart Pain caused by mismatch of oxygen supply vs. oxygen demand • Causes related to oxygen supply – Atherosclerosis – Spasms of coronary arteries (Prinzmetal’s variant angina) – Anemia • Causes related to oxygen demand – Hypertension – Pulmonary hypertension – Heart valve disease • Note: When severe these conditions may also affect supply • Attacks precipitated by exercise or strong emotion If Condition Progresses If Could lead to Myocar...
View Full Document

Ask a homework question - tutors are online