Cardiology Flashcards
Monitoring required when using Mg sulfate?
Urine output
RR
O2 sat
What to do if respiratory depression when giving Mg Sulfate?
Calcium gluconate
Cardiac CP + Bradycardia + Low BP is suggestive of what? which structure is affected?
Suggestive of MI with complete heart block
RCA occlusion - as this supplies SA and AV nodes
Effect of thiazide diuretics on bones?
Reduced renal excretion of calcium
-> increased osseous matter + reduced risk of fractures
Contraindications to statins?
Macrolides - -mycin abx (stop until course is complete)
Pregnancy (stop 3 months before) - cholesterol cruical for foetal development + teratogenic risk
Main ECG change for hypercalcaemia?
Short QT
Main cause of infective endocarditis in colorectal ca?
Streptococcus bovis most commonly:
->Streptococcus gallolyticus
Pathogenesis of arrhytmogenic RV cardiomyopathy?
Right ventricular myocardium is replaced by fatty and fibrofatty tissue
Pathophysiology of long QT?
Loss of function of K+ channel / blocked K+ channel
ECG changes in Brugada syndrome? How can these changes be made apparent?
Convex ST segment elevation > 2mm in > 1 of V1-V3 followed by a negative T wave
Partial right bundle branch block
Exaggerate this by administering flecainide or ajmaline
Mutation in Brugada syndrome?
SCN5A gene - encodes myocardial Na channel protein
What examination sign is an early sign of LVF?
Gallop rhythm - S3 sound
Pathophysiology of HOCM?
Mutation to gene encoding B-myosin heavy chain protein or myosin-binding protein C
Which factors are affected by Warfarin?
10, 9, 7, 2
Warfarin was invented in 1972
Which medication used for HTN can impact HbA1c?
Thiazide diuretics - impaired glucose tolerance
Heart murmur in ebstein’s anomaly?
Tricuspid regurg - pansytolic murmur worse on inspiration
VSD murmur?
pansystolic murmur worse on expiration
Which cause of endocarditis is associated with poor dental hygiene? examples?
Streptococcus viridans - examples:
- Streptococcus mitis
- Streptococcus sanguinis
ECG changes for hypothermia?
bradycardia
‘J’ wave (Osborne waves) - small hump at the end of the QRS complex
first degree heart block
long QT interval
atrial and ventricular arrhythmias
What are aschoff bodies?
These are the ganulomatous nodules found in rheumatic heart fever
Which part of ECG wave is electrical cardioversion sync’d to?
The R wave
How to reduce risk of developing pre-eclampsia?
Low dose aspirin (75-150mg)
Given 12 weeks gestation until the birth if
≥ 1 high risk factors
≥ 2 moderate factors
Causes of loud S2?
- HTN (systemic or pulmonary)
- Hyperdynamic states
- Atrial septal defect w/out pulmonary HTN
Heart sounds in complete heart block?
Variable intensity of S1