53 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 ... Un-stimulated #PQ ... ) QRS #QRS #SA
Supraventricular Tachycardias - Pathophysiology
Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
Pathophysiology Conduction pathways ... through SA Node ... cardiology #conduction #pathways
Cardiac conducting system 
 - Sinoatrial (SA) node normally generates the action potential, i.e. the electrical
- Sinoatrial (SA ... - The SA node ... through internodal pathways ... Heart #Conduction #Pathways
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
and extrinsic pathways ... in the common pathway ... Causes include : ... Pre-analytical cause ... to the common pathway
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
Arrhythmias • SA ... > 100 bpm) • SA ... Differential #Diagnosis #Causes
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
tachy not from SA ... /brady) (3) SA ... escaped beats (4) SA ... 200ms from longer pause
Antiemetics and Vomiting

#Pathophysiology #Antiemetics #Locations #Action #Pathways #Nausea #Chemotherapy #TriggerZone #CTZ
Locations #Action #Pathways ... #Nausea #Chemotherapy
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Causes of Abnormal ... deficiencies: Contact pathway ... Pre-analytical cause ... to the common pathways ... aPTT #Prolonged #Causes
Wolff–Parkinson–White syndrome (WPW) is one of several disorders of the electrical system of the heart that
WPW is caused by ... electrical conduction pathway ... this abnormal pathway
First Generation Anti-Psychotics: Mechanisms and Side Effects
Typical/Conventional Anti-Psychotics - Examples: Haloperidol, Chlorpromazine

ACh M1 antagonist - Block
Hypotension Mesolimbic Pathway ... Mesocortical Pathway ... Tuberoinfundibular Pathway ... Nigrostriatal Pathway ... , and/or limbs caused