Likert-Scale for scoring the transthoracic echocardiography loops

Likert Scale
1	Acquired loop is not acceptable, e.g., no structures recognizable or not accomplished in the required time
2	Acquired loop is of poor quality and not sufficient for an emergency evaluation, e.g., not enough ventricle is visualized
3	Acquired loop is in case of emergency fair but has a lot of room for improvement, e.g., severely foreshortened, aortic or mitral valve not visualized sufficient
4	Acquired loop is close to “gold standard” only slight room for improvement, e.g., papillary muscle seen
5	Similar to “gold standard”