5678 results
Pacemaker Indications
Class I
 • Symptomatic sinus node dysfunction
 • 3° AV or type 2 2° AV
Symptomatic sinus node ... etiology with sinus node ... #indications #cardiology ... #management
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
Brady Management ... • Block in AV node ... block beyond AV node ... electrocardiogram #ecg #cardiology
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Immunologic: • Osler nodes ... Endocarditis #diagnosis #management ... #cardiology
Cervical Lymphadenopathy - Lymph Node Drainage
Preauricular nodes - Drain scalp, skin
 • Differential diagnosis: Scalp infections,
Lymphadenopathy - Lymph Node ... Preauricular nodes ... Posterior cervical nodes ... as preauricular nodes ... Supraclavicular nodes
Supraventricular Tachycardias - Pathophysiology
Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
pathways through SA Node ... , Atrium, AV Node ... SVT #diagnosis #cardiology
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
Arrhythmias • SA node ... Syndrome (SSS) • AV node ... 100 bpm) • SA node ... Tachycardia (MAT) • AV node ... Diagnosis #Causes #cardiology
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
Head&neck, Lymph Nodes ... Lymph node entirely ... Note the characteristic
Junctional Rhythms - Junctional rhythm describes an abnormal heart rhythm resulting from impulses coming from a
atrioventricular node ... #Cardiology #MedStudent
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 node - Un-stimulated ... QRS #QRS #SA node ... #AV node #Bundle
Second Degree Heart Block, Mobitz Type I (Wenckebach)

P waves and QRS complexes are normal but... 
•
within the AV node ... HeartBlock #Diagnosis #Cardiology