3055 results
Torsades de Pointes 
•Precipitated by drugs that prolong the QT interval 
•Class IA antidysrhythmics (procainamide, quinidine)
quinidine) •Class IC ... TorsadesDePointes #Diagnosis #Cardiology
Antiarrhythmics - Sodium Channel Blockers
Subclasses, Mechanisms, Indications, Side Effects
la - Quinidine, Procainamide
lb - Lidocaine, Mexiletine
Ic -
Lidocaine, Mexiletine Ic ... Blockers #ClassI #Na #cardiology
Antiarrhythmic Drug Classes 
IA: "Police Department Questions 
IB: Liquored Man 
IC: For Peeing, 
Ill: After Drinking
Liquored Man IC ... Lidocaine Mexiletine IC
Signs of Pulmonary Hypertension on Chest CT
 • Main PA is dilated and larger than the
Hypertension on Chest ... PHTN #ChestCT #CTChest ... #Radiology #cardiology
Class I Antiarrhythmics and their Key Pharmacologic Properties

Class IA = Quinidine, Procainamide, Disopyramide ("Quarter PounDer")
Class IB
Pickle") Class IC ... channel blockade: IC ... the ERP: IA > IC ... Pharmacology #Agents #Cardiology
The arrows point to a subendocardial region with poor contrast enhancement due to ischemia. This is
Clinical #EM #IM #Cardiology ... #Radiology #CTChest
Torsades de Pointes
• "Twisting of the pointes" 
• QRS axis swings from positive to negative direction
quridine) Class IC ... TorsadesDePointes #Diagnosis #Cardiology
Lung Segment Anatomy Annotated on Chest CT
Right Lung:
 • Upper Lobe: Apical, Posterior, Anterior
 • Middle
Anatomy Annotated on Chest ... lobes #Segments #Chest ... #CT #CTChest #pulmonary ... #clinical #radiology
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Class I (Ia, Ib, Ic ... Classification #Classes #cardiology
Differentiating Pacemaker vs ICD on Chest XRay
 - Single Chamber PPM
 - Single Chamber ICD
 -
Pacemaker vs ICD on Chest ... ChestXRay #CXR #Radiology ... comparison #clinical #cardiology