Cardio Flashcards
(196 cards)
Mx of VT/VF
defib!
if awake, anaesthetist GA/midazolam then defib
if cant have GA, amiodarone IV +/- BB
symptoms of VF
syncope/ LOC
symptoms of VT
palpitations
SOB
syncope/pre-syncope
chest pain
causes of VT/VF
MI drugs LV impairment electrolytes channelopathies [long QT/Brugada] HCM
if Pt went into VT/VF due to MI, recurrence not v likely unless another MI.
If cause is still there e.g. HCM, how would you Mx?
amiodarone/ BB
ICD [internal cardiac defib]
[maybe ablation]
VT ECG findings
broad complex
regular
VF ECG findings
broad complex
irregular
Atrial flutter ECG finding
saw tooth
regular
SVT ECG findings
narrow complex
SVT sx
palpitations
Mx of SVT
vagal manoeuvres [syringe + carotid massage]
adenosine 6mg, then try 12mg
verapamil
if compromised, dc cardioversion
long-term - BB, flecainide, CCB, (ablation)
causes of AF
age big LA HF mitral disease hyperthyroid HtN MI > LV damage
tool to decide whether to anticoagulate someone with AF & score to anticoag
CHADS2VASC
>1 male, >2 female
chronic AF Mx
warfarin/NOAC
metoprolol [/diltiazem/verapamil/amiodarone]
digoxin in sedentary
cardioversion +/- amiodarone, or flecainide
should the AVR lead on an ECG have a positive or negative tracing
-ve
how can you identify a patient is in sinus rhythm from an ECG
every QRS must be preceded by a P wave [impulse originates from sinus node]
regular
rate 60-100
how do you work out the axis from an ECG
lead 1 and AVF should both be positive
what is sinus arrhythmia
slight shortening and lengthening with respiration, common in young
what causes a prolonged PR interval
heart block
what causes a short PR interval
accessory pathway e.g. WPW
how long should the PR interval be
3-5 small squares
describe the degrees of heart block
1st = constant prolonged PR 2nd = mobitz 1 lengthening, then drops 1. mobitz 2 constant prolonged then drops 1. 3rd = no relationship between P + QRS
mx of heart block
pacemaker
define heart block
disrupted passage of impulse through AVN