13 results
Stimulated
SA node
AV node -
Un-stimulated
#PQ
(mV) 0
ECG (lead II)
QRS
#QRS
#SA node
#AV node
#Bundle of His
Bundle branches
#Purkinje fibers
#QRS
#ST
Stimulated SA node AV ... Un-stimulated #PQ ... (mV) 0 ECG (lead ... QRS #SA node #AV ... node #Bundle of
Bradycardias Comparison Table
 - SINUS BRADYCARDIA 
 - JUNCTIONAL BRADYCARDIA 
 - 1st DEGREE AV BLOCK
Bradycardias Comparison Table ... - 1st DEGREE AV ... - 2nd DEGREE AV ... #ECG #Bradycardia ... Common #Comparison #Table
Algorithm for the Evaluation of Regular, Wide-Complex Tachycardia
1. aVR: Is the initial deflection in aVR positive?
Algorithm for the ... AV Dissociation: ... there evidence of AV ... Bundle-branch morphology ... Interpretation #ECG
Treatment of Stable Narrow-Complex Tachycardia
Regular Rhythm:
 • Attempt vagal maneuvers
 • Give adenosine 6 milligrams IV
Treatment of Stable ... Control rate with AV ... Control rate (e.g ... underlying cause #Stable ... management #cardiology #algorithm
Treatment of Stable Wide-Complex Tachycardia
Regular
 • If ventricular tachycardia or uncertain rhythm:
    -
Treatment of Stable ... WPW) - Avoid AV ... nodal agents (e.g ... irregular protocol #Stable ... management #cardiology #algorithm
Pediatric SVT - Management Algorithm
Identify SVT:
 • HR not variable
 • Abrupt rate changes
 • Infants:
SVT - Management Algorithm ... : HR > 180bpm ECG ... Monitors, Pads AP Stable ... 0.2 mg/kg Unstable ... tachycardia #Management #Algorithm
Shock - Differential Diagnosis by Classification
Reflex Syncope 
 - Vasovagal syncope
   • Prolonged standing
Sinus pauses • AV ... Medication side effect (e.g ... Medication side effect (e.g ... Classification #Table
Compelling and Possible Contraindications to Antihypertensive Drugs
Diuretics (thiazides)
 - Gout
 - Metabolic syndrome, Glucose intolerance, Pregnancy,
diltiazem) - AV ... Pgp-dependent drugs (e.g ... Blockers - Asthma, AV ... - Depression, AV ... contraindications #table
Muscarinic Receptor Agonists and Antagonists 
Muscarinic Receptor Agonists
Methacholine
 • Diagnosis of bronchial airway
Carbachol
 • Glaucorna (topical
symptomatic bradycardia (e.g ... ., AV block) • ... #Pharmacology #Table
Preoperative Risk Evaluation

Major Pre-Op Questions:
1. Does the patient have any modifiable risk factors that could be
functional status - Able ... metabolic equivalent able ... event, follow ACC algorithm ... Obtain EKG if: ... Stable patients