Cardiology Flashcards
Pericardial ECG stages
Hrs: diffuse concave STE, PR depression
Days: normalisation
Weeks: TWI
Months: normalisation 3/12 or ongoing TWI
Pericarditis Management
Ibuprofen 2/52 (viral)
Aspirin (post-MI)
Colchicine 0.5mg BD 3/12 (acute)
Colchicine 0.5mg BD 6/12 (chronic)
BER vs Pericarditis
BER:
- ST/T <0.25
- Precordial leads only (V1-4)
- ECG stable (stages in pericarditis)
- J wave in V4 in BER
STEMI DDX
MI Dissection BER Myocarditis Vasospasm SAH Ventricular Aneurysm LBBB/PPM PE Hyperkalaemia Post-cardio version Brugada Takotsubo cardiomyopathy
VT ECG
Extreme NW axis QRS >160ms AV dissociation Capture & Fusion beats Concordance RSR taller left rabbit ear Notched S wave (Josephson sign)
VT more likely in what patients compared to SVT
Age >35 yrs Structural Heart Disease IHD or MI CCF Cardiomyopathy Family Hx of SADS
Electrical Alternans
Pericardial Effusion (low voltage, tachy) WPW Prolonged QTc Hypothermia Cor pulmonale RHD
RAD DDX
(Think big RV causes)
Pulm HTN RVH COPD Na blocking drugs Hyperkalaemia Sinus inversus Newborn Misplaced leads Old lateral MI
Pericardial Tamponade ECHO
Anechoic stripe around heart
RV collapse on diastole
RA & LA collapse in systole
Dilated non-collapsing IVC
PCI vs Thrombolysis timings
Onset within 1hr: PCI within 1hr
Onset 1-3 hours: PCI within 90mins
Onset 3-12 hours: on-site PCI 90mins, off-site PCI 120mins
Brugada Syndrome diagnosis
Coved STE >2mm in V1-3 w/ TWI or saddleback STE 2mm
AND
Clinical criteria:
- hx of VF or polymorphic VT
- family hx SADS
- family members with same ECG
- syncope
- nocturnal atonal respiration
- Inducible VT
Management Brugada
ICD
Quinidine in neonates or asymptomatic
Wellens dx
Deeply inverted or biphasic T waves V2/3
Painfree
No Q waves
Recent angina
Triggers for Brugada
Fever Ischaemia Cocaine or booze Bblockers or CCB low K Hypothermia Post-DCR
External Pacing indications
3rd degree HB Mobitz II HB Unstable bradycardia with medication failure Overdrive pacing ? Asystole
Describe how to externally pace
Resus, setup, AP pads
Consent & sedation
Connect ECG pads for sensing
Demand pacing mode >30bpm above rate
Start and increase amp until capture (add 10)
If >120mA then resite electrodes and go again
Assess capture by palpating pulse
Reasons for PPM failure
Fractured lead PPM Malfunction Oversensing Lead displacement Fibrosis at lead tip Ischaemia Change to underlying rhythm
HOCM clinical features
Exertional syncope Exertional dyspnoea (pulm congestion) Sharp rising pulse Chest pain & palpitations Systolic murmur
HOCM ECG
LVH Deep dagger Q waves lateral & inferior leads LAE Tachyarrythmias (WPW, AF, SVT) Giant TWI precordial leads (apical HOCM)
HOCM SADS RF
VF or VT Family hx SADS Syncope LV wall >3cm LVOT non-sustained VT
HOCM murmur
Increases with decreased preload (valsalva, standing)
Decreased with increased preload (leg raise, hand grip, squat)
HOCM vs AS murmur
HOCM opposite of preload
AS increases/decreased with preload
Increase preload: squatting, leg raise, handgrip
Decrease preload: valsalva, standing
AS: slow rising pulse, displaced apex, aortic thrill, S4 (dilated LV), splitting 2nd HS
Murmurs:
Mid-systolic
Pan-systolic
Diastolic
Mid-systolic: AS, PS, HOCM, ASD
Pan-systolic: MR, TR, VSD
Diastolic: MS, TS, AR, atrial myxoma, ARf
Sgarbossa
Concordance STD 2mm V1-3
Concordance STE 1mm any lead
Discordance STE 5mm any lead
DeWinter
Up-sloping ST depression 1mm with peaked T waves
STE 0.5mm aVR
Hypokalaemia ECG
Peaked P wave 1st HB Prolonged QTc U waves TWI or flattening ST depression
STEMI Fibrinolysis Dose
Tenectaplase & Alteplase
Tenectaplase: 0.5mg/kg (to nearest 10kg)
Alteplase:
<65kg: 15mg bolus, 0.75mg/kg 30mins, then 0.5mg/kg 60mins
>65kg: 15mg bolus, 50mg 30mins, then 35mg 60mins
Pericarditis causes
Viral (CMV, EBV, HIV, coxsackie B) Bacterial (Staph, Strep, TB, GNB) Parasitic (Entamoeba, toxoplasma) Malignant (sarcoma, mesothelioma, mets) Autoimmune (SLE, RA, Sarcoidosis, IBD) MI (acute or desslers) Uraemia/myxoedema Other: trauma, radiation, drugs (penicillin)
Successful thrombolysis STEMI
Pain resolution STE reduced 70% Improved haemodynamics Accelerated idioventricular rhythm TWI 4 hours post MI
VT in pregnancy tx
DCR: safe, effective, sedation risk
Amio: sig failure to reverse, fetal thyroid disease
Lignocaine: safe, 1st Med line, increased failure than DCR
Mg: safe, better in polymorphic
Metoprolol: effective, no fetal risk, hypotension