42 results
The JT Interval and Pro-Arrhythmic Risk
Measured from the J-point to the end of the T-wave, the
The JT Interval ... T-wave, the JT interval ... you use the JT Interval ... than prolonged QT ... with QRS ≥120 ms
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
• PR interval < ... Flattened T waves QT ... • QT interval is ... formula: QTC = QT ... thumb: a normal QT
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Differential Diagnosis Algorithm ... (constant R-R Interval ... (variable R-R interval ... setting of long QT ... Differential #Diagnosis #Algorithm
REBEL Review 100: Canadian Syncope Risk Score 

Predisposition to Vasovagal Symptoms (-1)
History of Heart Disease (1)
Any
QRS Duration 130 ms ... (1) Corrected QT ... Interval > 480 ... ms (2) Vasovagal
Torsades de Pointes (TdP): Pathogenesis and Clinical Findings

Polymorphic ventricular tachycardia initiated by PVC in the setting
Pathogenesis and Clinical ... the setting of QT ... interval prolongation
Recurrent Polymorphic VT/Torsades de Pointes - Management Algorithm
Drugs that prolong QT interval:
 • Class 1a (quinidine,
Pointes - Management Algorithm ... Drugs that prolong QT ... interval: • Class ... Congenital long QT ... TDP #Management #Algorithm
Approach to ECGs
Check
 - Age, gender, name
 - 25mm/s; 10mm/mV
 - 1mm = 40ms; 0.1 mV
Rate
dextrocardia, normal Intervals ... DANGER - Short QT ... <300-360 ms: ↑ca ... - Long QT: "antis
Checklist Approach to Hypokalemia

Consider risk factors for arrhythmia:
 - EKG changes (especially QT prolongation)
 - Digoxin
changes (especially QT ... incongruous with clinical ... Enteral potassium ... with questionable enteral ... Internet Book of Critical
Piriformis Test (FAIR Test - Flexion, Adduction, and Internal Rotation)

Flex the hip to 90 degrees, then
Adduction, and Internal ... sciatica #lumbar #clinical ... #physicalexam #msk
Causes of Adrenal Insufficiency - Differential Diagnosis Algorithm
Autoimmune:
 • Isolated
 • Polyglandular autoimmune syndrome 1
 •
Differential Diagnosis Algorithm ... Thrombophilia • Critical ... Frameworks for Internal ... Differential #Diagnosis #Algorithm