Quike & Vivi's World

Thursday, July 21, 2011

• CPP = MAP - IP
(Cerebral Perfusion Pressure) (Mean Arterial Pressure) (Intracraneal Pressure)
• MAP = CO x TPR
(Cardiac Output) (Total Peripheral Resistance)
• CO = HR x SV
(Heart Rate) (Stroke Volume)
• TPR = Viscocity / radius4

Some Respiratory Formulas

• VTotal = VDead Space + VAlveolar

• Vmin = TV x RR

• TV = 10-15 cc/Kg

Example:
• VTotal = VDead Space + VAlveolar
5000 40% ?? = 3000
• Vmin = TV x RR
5000 500 x 10
• TV = 10-15 cc/Kg

Tuesday, July 12, 2011

CARDIAC CYCLE

•S1 begining of systole → Mitral & Tricuspide closure

•S2 begining of diastole.→ Aortic & Pulmonary closure Variation with Respiration (P2 separates away from A2 b/c more blood is comming into the rigth heart, so the valve closes a little bit later).
•S3 occurs in early diastole during rapid ventricular filling (after MV opens). Associated with ↑ filling pressures commonly in dilated ventricles (vol overloaded). Normal in kids and pregnant♀.
•S4 occurs in late diastole. Associated with ventricular hypertrophy (concentric HPY). High atrial pressure (Left atrium must push against stiff LV).

○ Aortic Stenosis → EC (when AV opens)
○ Mitral Prolapse → MC (sudden tensing of chordae tendinae)
○ Mitral Stenosis → OS (tensing of chordae tendinae.
EC= Ejection click, MC= Midsystolic click, OS= Opening snap
Heart Sounds
Auscultation Assistant