WEEK 1 Flashcards
Cardiac Anatomy, Physiology, Resuscitation & Defib
What kind of pump is the heart?
Electromechanical
A complete heartbeat that has rhythmically recurrent contraction, where the blood is forced out of the chambers and into the aorta & pulmonary artery is?
Systolic
A complete heartbeat that has rhythmically recurrent expansion, where the heart relaxes and dilates the chambers of the heart allowing the ventricles to fill with blood is?
Diastolic
Cardiac Cycle is?
SA node > AV node > Bundle of HIS > purkinje cells
What are the 2 nodel cells?
Sinoatrial (SA) & Atrioventricular (AV)
What are the non-nodels?
Atrial & Ventricular myocytes & Purkinje cells
What is the intrinsic rate & heart rate for SA node?
Instrinsic 100bmp & HR 60-80 bpm
What is the SA node?
Pacemaker
What is the intrinsic rate for AV node & bundle branches?
40-60bpm
What is the BPM for ventricle & purkinje network?
20-40bpm
Life Pak 15 Jouls
- 200
- 300
- 360
Compulsory jouls?
200
4 safety checks for Defib?
- Non conductive
- Non combustible /explosive
- No contact
- No movement
Shockable rhythms
VT & VF
Non shockable
- Asystole
- PEA
- Perfusing rhythms
- Pt with signs of life
CPR Rates
Adults: 30:2
Paeds: 15:2
4 priorities in cardiac arrest
- Early recognition
- Early high quality CPR
- Early defib
- Manage ROSC
When are stack shocks administered?
When cardiac arrest is witnessed
ROSC management?
- Maximise O2
- Maximise Ventilation
- Maximise Perfusion
- Maintain ROSC
- Prevent secondary brain injury
- Treat arythmias
Anatomical location of the heart?
Between lungs in middle of chest, behind the left breastbone
What is the epicardium?
The outer layer of the heart
The middle layer of the heart is?
Myocardium
What is the endocardium?
Inner layer of the heart
Cardiac Cycle: Automatacity
Generate & maintain electrical pulses
Cardiac Cycle: irritability/excitability
Cells respond to electrical impulses
Cardiac cells: Conductivity
Relay electrical impulse to neighbouring cells
Cardiac cells: contractility
Respond to electrical impulses with pumping action