Authors’ affiliations:
Kansai Rosai Hospital Clinical engineer, 3-1-69 Inabaso, Amagasaki, Hyogo, Japan
Kansai Rosai Hospital Cardiovascular Center, 3-1-69 Inabaso, Amagasaki, Hyogo, Japan
Funding and conflicts of interest: Not is all authors.
Total word count: 3939
Figure and table : 4 figures and 3 tables
Supplemental figure: 2 figures