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Atrial Fibrillation - Diagnosis, Causes, Presentations
Causes (PIRATES):
 - Pulmonary embolism 
 - Ischemia (cardiac) 
 -
- Diagnosis, Causes ... - Ischemia (cardiac ... withdrawal ("holiday heart ... #Fibrillation #AFib ... #Diagnosis #Causes
Causes of Atrial Fibrillation

Heart disease 
 - Aging heart 
 - Cardiomyopathies 
 - Congestive heart
Causes of Atrial ... Abnormalities in cardiac ... Sleep apnea #Atrial ... #Fibrillation #AFib ... #Cardiology #Pathophysiology
Multifocal Atrial Tachycardia (MAT) on EKG
 • Heart rate > 100 bpm (usually 100-150 bpm)
 •
Multifocal Atrial ... • Heart rate ... #Tachycardia #diagnosis ... #cardiology #EKG ... #labeled #clinical
Atrial Fibrillation Overview

Symptoms:
Palpitations, light-headedness, dizziness, dyspnea, exercise intolerance, chest pain, near-syncope, syncope.

1. Why?
Cardiac:
• Valvular heart disease
•
Cardiac: • Valvular ... heart disease ... • Structural heart ... #Fibrillation #Cardiology ... #Management #Algorithm
Digoxin effect on Electrocardiogram (EKG)
Digoxin is a cardiac glycoside from the foxglove leaf
Mechanism
 - Inhibits Na-K
Electrocardiogram (EKG ... Digoxin is a cardiac ... nodal conduction Uses ... rate control) - Heart ... #Cardiology #Digitalis
Palpitations - Differential Diagnosis Framework

What?
• It is an unpleasant awareness or sensation that the heart is
- Differential Diagnosis ... Palpitations Diagnosis ... Nonarrhythmic Cardiac ... /Afib/WPW) • Loss ... #Palpitations #Cardiology
Causes of Palpitations
 • ARRHYTHMiA 
 • SINUS ARRYTHMIA 
 • ATRIAL FIBRILLATION 
 • ATRIAL
FLUTTER • HEART ... VALVULAR DISEASE • HEART ... SYPATHOMIMETICS • CARDIAC ... #Differential #Diagnosis ... #Cardiology
Atrial Fibrillation (A-Fib) Summary

Symptoms:
• Palpitations, light-headedness, dizziness, dyspnea, exercise intolerance, chest pain, near-syncope, syncope.

Why?
Cardiac:
	• Valvular heart
Cardiac: • Valvular ... heart disease ... • Structural heart ... #diagnosis #management ... #cardiology
Myocarditis
Diagnosis 
• Endomyocardial biopsy (gold standard, rarely performed) 
• Clinical presentation 
• Cardiovascular MRI 
Clinical 
•
Myocarditis Diagnosis ... performed) • Clinical ... gallop • Abnormal ECG ... shock, sudden cardiac ... #Management #Cardiology
Chest Pain - Diagnosis and Workup Algorithm

History and Exam
Acute life-threatening causes:
 • Acute myocardial infarction
 •
life-threatening causes ... Pulmonary embolism • Cardiac ... Initial workup: • EKG ... , PT. aPTT • Serial ... troponin; HEART