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Table 1 Description of the mnemonic A-F algorithm

From: Validity of a 5-minute focused echocardiography with A-F mnemonic performed by non-echocardiographers in the management of patients with acute chest pain

Letter Description Question Possible diagnosis (if the answer is YES)
A Aorta Is aortic root dilated? Aortic root dilatation/aneurysm
Is proximal aortic diameter > 4 cm? Ascending aortic dilatation/aneurysm
Is dissection flap seen? Aortic dissection
B Both ventricles Is there RV overload present? Pulmonary embolism
RV/LV > 1 Pulmonary hypertension
D-sign RV infarction
C Contractility Is LV contractility impaired?  
Depressed global systolic function LV heart failure
Regional wall motion abnormalities Acute myocardial infarction
Is RV contractility impaired?  
Depressed global systolic function RV heart failure; RV infarction; pulmonary embolism
D Dimensions Are there any abnormal dimensions?  
Ascending aorta > 4 cm Aortic dilatation/aneurysm (look for aortic dissection)
LV end-diastolic dimension > 6 cm LV dilatation (assess global LV function)
RV end-diastolic dimension > 4.2 cm RV dilatation (look for the RV overload)
LA anteroposterior dimension > 4.5 cm LA dilatation
RA major > 5.4 cm and/or minor dimension > 4.4 cm RA dilatation (look for RV overload)
E Effusion Is pericardial effusion present? Pericardial effusion
Are there any signs of cardiac tamponade? Cardiac tamponade
RA end-systolic or diastolic collapse
RV diastolic collapse
Vena cava plethora
Is there pleural effusion? Pleural effusion
F Further abnormalities Any other abnormal findings not listed above?
  1. From: Sobczyk and Andruszkiewicz P [8].