Brady IBHRE questions with correct answers

SA node --(internodal pathway)- AV node -- AV bundle -- bundle branches -- purkinje fibers - correct answer what is the order of the conduction system of the heart SVC & IVC --- RA --- Tricuspid --- RV --- P Valve --- PA --- lungs --- P Veins --- LA --- Mitral valve --- LV --- Aortic valve --- Aorta --- Body - correct answer What is flow of blood through heart Conductivity- cell to cell communication automaticity - spontaneous depolarization Refrectoriness- inability to be stimulated after depolarization excitability- ability to recieve outside stimuli - correct answer List and define the four characteristics unique to cardiac cells EF=(EDV-ESV)/EDV - correct answer Equation for ejection fraction preload - correct answer the stretch of mycardial fibers at end of diastole (atrial Kick) intropy - correct answer contectility, the force of contraction to pump blood throughout the body 60-120 ms - correct answer what is the normal length for a QR interval FFP occurs after a Vs, Vp, and PVC. It prevents crosstalk on atrial channel - correct answer what is FFP blanking period after an Ap on vvent channel to prevent crosstalk - correct answer what is ventricular blanking