Intrinsic Conducting System Flashcards
where is the SA node located and its function
right artial wall-primary pace-maker of the heart
AV node location and function
above tricuspid valve-delays de-polarisation to allow for atria to complete their contraction
Maximal ventricular filling
PWave Electrical and Mecahnical Events
E:Arital deporlastion
M:artial contraction
QRS Complex E event and M event
E: Ventricular Deporalisation
M: Ventricualr Contration
T wave Electrical event, Mechanical event
Ventricular repolastion
Ventricular Relaxation
Where are b1 adrenergic receptors found
SA node, conducting system
Myocardium
What is the Parasympathetic supply to the heart
M2-Muscarninc
Most Visercal Pain travel in?
viseral affernt fibres that accompany sympathetic fibres
Most unconscious senstation-
Parasympathetic fibres
Rt Ventricle-which circuit
Deoxynated-Pulmonary Circuit
Lt Ventricle-Systemic Circuit
Oxyngated-Systemic
Systole?
period of contraction
Diastole?
Period of Relaxation
Mid-to-Late Ventriuclar Diastole?
Ventricular fills
Artia contracts
Ventricular Systole?
Isovolumteric Contraction
Ventricular Ejection Phase
Early ventricular Diastole?
Isovolumetric Relaxtion
S1= LUB
closure of AV at start of Vent. Systole
s2= DUB
close of Sl vale and vent diastole
Determinants of HR
Nerual-Chemiacal-Physical
Determinants of SV
- Pre-Load-cardiac mm are stretched before they contract(amount of venous return)
- Contractility- Intrinsic strength of contraction-Sympathtic Stim-Chemical Factors
- Afterload-Hypertension-afterload in systemic
- Pilmonary hypertnetion-pulmoanry circuit
