Chest pain Flashcards
State equation for CO?
CO= HR x SV
State 4 factors effect HR?
1) Hormones
2) Fitness lvls
3) Age
4) Autonomic innervation
State equation for stroke volume?
SV= EDV-ESV
Name 7 factors affect SV?
1) Contractility
2) Preload (EDV)
3) Afterload (pressure ventricles must overcome)
4) Heart size
5) Fitness lvl
6) Gender
7) Duration contraction
Define contractility?
How hard/fast muscle flexes
Define preload?
Degree of the ventricular stretch when the heart is at the end of diastole (relaxed)
Define afterload?
Force against which ventricle must act in order eject blood
State equation:
CO
BP
PP
MAP
SV
CO = HR x SV
BP = CO x TPR
PP = SP – DP
MAP = DP + 1/3PP
SV = EDV – ESV
State 5 factors that affect bp?
1) Vasopressin
2) Aldosterone
3) ANP
4) Stressors
5) Weight
6) Posture
What occurs if occlusion of left anterior descending artery?
Territory
Effect
Symptoms
Territory- Ant 2/3 septum, lateral wall left ventricles
Effect- block impulse conduction between atria and ventricles
- L/R heart block
Symptoms- infarction, ST elevation, heart failure, prolonged PR (type 1)
What occurs if occlusion of right coronary artery?
Territory
Effect
Symptoms
Territory- RCA supply SAN and AVN
Effects- conduction nodes effected- contractions off
Symptoms- chest pain, pain radiation
What supplies SAN and AVN?
RCA
What causes first heart sound?
What change pressure?
What sound?
AV valves close
Semilunar valves open
Ventricular pressure increases
Aortic pressure increases
Lub
What causes second heart sound?
Pressure?
Sound?
Semilunar valves close
AV valves open
Decrease aortic and ventricular pressure
Dub
