Cardio Flashcards
RE-LY - 2009
Noninferiority trial
Dabigatran vs Warfarin
Warfarin reduces stroke risk by
~55%
AFFIRM - 2002
Pts w non-valvular AF
Rate vs rhythm control non-inferior,
Rhythm control shows trends towards increased mortality
RACE II -2010
Lenient (HR <80/min) in preventing cardiovascular events
Antiarrythmic drugs - Class I
NaCB
1a - procainamide, quinidine
1b - lidocaine
1c - flecanaide, propafenone
Anti arrhythmic drugs - Class II
BBs
Anti arrhythmic drugs - Class III
KCBs
Amiodarone, sotalol, dofetilide
Anti arrhythmic drugs - Class IV
CCBs
Digoxin
Na-K ATPase inhibitor: increases contractility (IC Na increases, resulting in Ca influx)
AV node blockade - increases effective refractory period, slows heartrate
Inotropic effect
+ increases myocardium contractility
- decreases myocardium contractility
Chronotropic effect
+ increases HR
- decreases HR
Dromotropic effect
+ increases AV node conduction speed
- decreases Av node conduction speed
Maintenance of Sinus rythtm if no Heart disease (and HTN without LVH)
1st choice: flecanaide, propafenone, sotalol
2nd line: amio, dofetilide, cath ablation
Maintenance of sinus rhythm if HTN & LVH
1st line: amio
2nd line: cath ablation
Maintenance of sinus rhythm if CAD
1st line: dofetilide, sotalol
2nd line: amio or cath ablation
Maintenance of sinus rhythm if CHF
1st line: amio, dofetilide
2nd line: cath ablation
Dronedorone
Amio derivate
Not in CHF
Causes GI upset
Causes incr of creatinine 2ry to decreased tubular secretion
Complications of AF ablation
Stroke
PV stenosis
LA tachycardias
SCT-HEFT
Pts w NYHA II/III and EF<35% mortality benefit of Prophylactic ICD
MADIT II.
Post-MI w EF=< 30% mortality benefit from prophylactic ICD
Biventricikar device Tx
NYHA III/IV w EF120-130 ms
NYHA I/II w LBBB QRS>130 and EF=<30%
When to Echo a murmur?
All diastolic
=< 2/6 if symptoms
=> 3/6 all
When to intervene? - MS
Valvuloplasty, if
Symptoms; AF; increased PAP on exercise
(Severe, if VA 60 or PAP >30 mmHg on exercise)
When to intervene! - AS
AVR - if symptomatic; if asymptomatic but EF4.0m/s, mean gr >40 mmHg)