Term
| define first degree AV block: |
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Definition
| uniformly prolonged PR interval |
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Term
| define second degree AV blocks: |
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Definition
Mobitz type I: Wenkebach = progressive PR elongation till a QRS is dropped
Mobitz type II: sudden conduction failure |
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Term
| define third degree AV block: |
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Definition
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Term
| how long is prolonged PR interval? |
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Definition
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Term
| 2 etiologies for first degree AV block: |
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Definition
1. Myocardial ischemia
2. Drugs; Digitalis, Beta blockers, Ca Channel blockers |
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Term
| Tx for first degree AV block: |
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Definition
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Term
| Etiologies of Mobitz I(wenkebach)second degree AV block:2 |
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Definition
1. reversible ischemia of AV node
2. Drugs: B-blockers, Ca channel blockers, digoxin |
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Term
| Tx for wenkebach second degree AV block: |
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Definition
| look for causes, correct reversible slowed conduction; avoid meds that AV conduction. Consider pacemaker |
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Term
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Definition
| bundle of His lesion, RBBB or Both |
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Term
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Definition
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Term
| 4 etiologies of third degree AV block: |
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Definition
1. elderly; sclerosis/fibrosis not from MI
2. drugs; digitalis
3. open heart surgery or MI
4. lyme dz |
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Term
| 2 common S/Sx of third degree AV block: |
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Definition
1. syncope
2. Stokes-Adams attacks |
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Term
| define: stokes-adams attacks |
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Definition
| transient episode of syncope, occasionally featuring seizures |
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Term
| Tx for third degree AV block |
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Definition
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Term
| bradycardia with alternating tachyarrhythmia: |
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Definition
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Term
| who is most often affected by sick sinus syndrome? |
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Definition
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|
Term
| what is the major Sx of sick sinus syndrome? |
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Definition
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Term
| how do you Dx sick sinus syndrome? |
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Definition
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Term
| Tx for sick sinus syndrome:3 |
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Definition
1 pacemaker
2. ablation therapy
3. drugs |
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Term
| 3 vasovagal stimulants that may cause syncope: |
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Definition
1. sudden unexpected pain,fear,sound,smell
2. prolonged motionless standing
3. well trained athlete after exertion |
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Term
| 4 examples of situational syncope: |
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Definition
1. micturition
2. cough
3. swallowing
4. defecation
all parasympathetic sys; slowing hr to brain |
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Term
| what are the 4 types of syncope |
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Definition
1. vasovagal
2. situational
3. carotid sinus
4. orthostatic hypotension |
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Term
| what is the acronym for CNS causes of sncope? |
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Definition
H - hypoxia/hypoglycemia
E - epilepsy
A - anxiety
D - dysfxnl brain stem |
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Term
| what is the acronym for cardiac causes of syncope? |
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Definition
H - heart attack
E - embolism PE
A - aortic obstruction
R - rhythm disturbance
T - tachycardia |
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Term
| what is the acronym for vascular causes of syncope? |
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Definition
V - vasovagal
E - ectopic (hypovolemia)
S - situational
S - subclavian steal
E - ENT (glossopharyngeal)
L - low systemic vascular resistance
S - sensitive carotid sinus |
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