Cardiac Medicine Certification

Stroke volume is reduced with: Perfuses: inferior wall posterior wall RV Septum SA node (60%) AV node (90%) When do coronary arteries perfuse Coronary artery perfusion is dependent on Loss of atrial kick and rapid ventricular rate RCA During diastole Diastolic blood pressure Perfuses: Lateral wall Perfuses: Anterior wall Septum (20%) LAD LCx Inferior/posterior wall in 10% of patients AV node (10%) Volume of blood ejected by the ventricle each minute Normal cardiac output Adjustment of CO for body size Normal cardiac output Volume of blood ejected with each beat Normal stroke volume Percent of blood ejected from ventricle Normal EF Three determinants of stroke volume Cardiac output formula Cardiac output 4-8L/min Cardiac Index 2.5-4 L/m^2/min Stroke volume 60-120 ml/beat Ejection fraction 55-70% Preload Afterload Contractility CO = HR x SV