Resuscitation and ECG Flashcards
how long till clinical death (reversible state) becomes biologic death (irreversible state of cellular destruction)
3-6 mins
how do you confirm cardiac arrest
patient response open airway check for normal breathing (caution agonal breathing) Check for signs of life- pulse (this should take less than 10 seconds)
what are good chest compressions
30:2
centre of chest 5-6 cm depth 2 per second (100-120 min-1) minimal interruptions (<5secs) After each compression, release all the pressure on the chest without losing contact between your hands and the sternum to allow for recoil
how quickly should the ventilations be done
2 within 10 seconds
what is important when putting on defib pads
shave chest if hairy
get good contact, avoid air trapping
what is transthoracic impedance
bodys resistance to current flow
varies due to body mass, age, disease, skin resistance, tissue type and amount
what is VF like on ECG
irregular waveform
no recognisable QRS complexes
random frequency and amplitude
uncoordinated electrical activity
exclude artefacts- movement/ electrical interference
what are the shockable rhythms
VF and pulseless VT
what is pulseless VT like on ECG
can be monomorphic:
- broad complex rhythm
- rapid rate
- constant QRS morphology
or polymorphic:
-torsade de pointes
when should you stop compression in defibrillation
to check rhythm
when shock delivered
(not when defib charging)
in resus when do you give medications
give adrenaline every 3-5 mins
give amiodarine after 3 consecutive shocks
what medications do you give in resus
adrenaline 1mg IV (potent vasoconstrictor)
amiodarone 300mg IV
what is asytole like on ECG
absent ventricular activity
atrial activity (P waves) may persist
usually a wavy line
what is the management for asytole
cant shock
CPR
adrenaline 1mg IV every 3-5 mins
DO NOT give amiodarone
what is pulseless electrical activity like on ECG
usually associated with an output, can be normal
just no pulse and features of ardiac arrest
what is the management for PEA
cant shock
CPR
adrenaline 1mg every 3-5 mins
what does SVT look like on ECG
narrows QRS’s
P waves present
fast rate
what are the reversible causes of cardiac arrest
hypoxia
hypothermia
hyperkalaemia
hypovolaemia
tamponade
thrombosis
toxins
tension pneumothorax
what management for hyperkalaemia
calcium gluconate (protect heart)
insulin with dextrose
salbutamol
what test for hypo/hyperkalaemia and metabolic disorders
ABG machine
management for hypothermia
active rewarming techniques
consider cardiopulmonary bypass
what are the clinical signs of a tension pnuemothorax
decreased breath sounds
hyper resonant percussion note
tracheal deviation
treatment for cardiac tamponade
neddel pericardiocentesis/ resuscitative thoracotomy
in PE how long should you continue CPR after fibrinolytic therapy given
60-90 mins
what is the P wave
atrial depolarisation
what is the PR interval
delay of AV node to allow filling of ventricles
what is the QRS complex
depolarisation of ventricles
what is the T wave
ventricular repolarisation
what is the ST segment
ventricular systole