FISDAP Cardiology Exam Study Guide Accurate 100%

Intrinsic rates - ANSWER SA node - 60 - 100 bpm AV junction - 40 - 60 bpm Purkinje network - 20 - 40 bpm Lidocaine doses - ANSWER 1-1.5 mg/kg, second dose 0.5-0.75 mg/kg Unstable VT tx - ANSWER Should be treated with synchronized cardioversion Hypotension, decreased LOC, shock, chest pain Stable VT tx - ANSWER IV/IO Adenosine 6mg; 12mg (followed by rapid saline flush) If ineffective, procainamide (20-50mg/min or amiodarone (150mg IV/10min) Consider antiarrhythmic infusion Definition of second degree type 2 (mobitz type II) - ANSWER Conduction usually occurs in bundle of His (bundle branches); appears as one or more P waves not followed by QRS (indicates SA node impulse was not conducted by ventricles) Causes - ischemic heart disease, anterior wall MI, infectious heart diseases Action of nitroglycerin - ANSWER Vasodilator; relaxes smooth muscle in vasculature, bronchial, uterine, and intestinal muscle; reduces preload and afterload, decreasing workload of the heart and myocardial oxygen demand Sino atrial dysrhythmias in lead 2 - ANSWER Premature atrial complex (PAC), supraventricular tachy (SVT), preexcitation (early depolarization of ventricles), a-fib, a flutter, wandering atrial pacemaker (WAP), multifocal atrial tachy (MAT) ST elevation in V3 and V4 MI location? - ANSWER Anterior wall MI S/S of thoracic aortic dissection - ANSWER Abrupt onset of constant, unbearable pain described as tearing or ripping and sharp, stabbing, or knifelike Definition of CO - ANSWER Cardiac output - amt of blood pumped by ventricle in 1 minute (normal 5-6 L/min) Stroke volume - amt of blood pumped by either ventricle in single contraction (normal 60 - 100 mL) CO = SV x HR(heart rate)