Table 2.

Protocols for cardiac point-of-care ultrasound

Protocol	Targets of the observation	Observation views
CLUE [18]	LV systolic dysfunction LA enlargement IVC plethora Ultrasound lung comet-tail artifacts (ULC)	Parasternal long-axis view Longitudinal subcostal view Lung apical views
FATE [8, 19]	Pericardial effusion Dilated RA, RV Dilated LA, LV LV hypertrophy LV, RV systolic function Pleural effusion	Subcostal 4-chamber view Apical 4-chamber view Parasternal long-axis view Parasternal short-axis view Bilateral pleural scans
FEEL [20, 21]	Pericardial effusion LV systolic function Pleural effusion	Subcostal 4-chamber Subcostal long-axis Parasternal short-axis Parasternal long-axis Apical 4-chamber view Pleura
FoCUS [17, 27]	LV dimension, systolic function RV systolic function Volume status Pericardial effusion, tamponade physiology Gross signs of chronic heart disease Gross valvular abnormalities Large intracardiac masses	Subcostal long-axis view Subcostal inferior vena cava view Parasternal long-axis view Parasternal short-axis view Apical 4-chamber view

CLUE cardiopulmonary limited ultrasound examination, FATE focus assessed transthoracic echo, FEEL focused echocardiographic evaluation in life support, FoCUS focused cardiac ultrasound examination