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Cause of short QT
Arrhythmia that TCAs can trigger
Torsade de pointes
Way to distinguish A flutter from A fib
- A flutter has regular, distinct P waves in a sawtooth patter
- A fib is irregularly irregular
Medication that should be given to stable patients with A fib
Heparin, to prevent clot formation
Drug that can be used to temporarily slow a rapid SVT
What drugs should NOT be given to a patient with WPW?
- Beta blockers
- ("ABCD"--all meds that slow conduction at the AV node)
Criteria for first degree heart block
PR interval over 0.2 s
Causes of Wenckebach (second degree heart block, with progressively elongating PR interval, followed by a dropped beat)
- Inferior wall MI
- Digitalis toxicity
- Increased vagal tone
Causes of Mobitz II (fixed PR interval with a regularly dropped beat)
- Inferior wall or septal MI
- Conduction system disease
Symptoms associated with HTN (usually do not manifest until stage III, which is bp > 180-209/110-119)
- Occipital headaches in the morning
- Blurred vision
How is mean arterial pressure calculated?
(2diastolic + systolic)/3
Why should a chest film be performed on a patient with suspected MI?
To rule out the possibility of aortic dissection, which would make thrombolysis a VERY bad idea
Difference between a true aneurysm and a pseudoaneurysm
- A true aneurysm involves all 3 layers of the arterial wall
- A pseudoaneurysm only involves the intima and the media