[Correction of time resolution of an ambulatory cardiac monitor (VEST)--using a pulsate cardiac phantom].
Using ambulatory cardiac monitor (VEST) at exercise study, its time resolution is very important factor. We evaluated the time resolution of VEST using pulsate cardiac balloon phantom. Four analyses were carried out; no smoothing (NS) method, 3 points smoothing (3S) method, short sampling interval (SS) method, and digital filter (DF) method. By comparison of [delta EF[ ([EF: HR120-EF: HR60[) among 4 analysis methods, [delta EF[ by DF method was significant small. (NS: 3.58 +/- 3.01, 3S: 4.46 +/- 0.95, SS: 3.35 +/- 3.26, DF: 1.11 +/- 1.28%). We conclude that correction of time resolution by digital filter is necessary when we use VEST during exercise.
Kumita
S
S
Department of Radiology, National Cardiovascular Center, Suita, Osaka.
Nishimura
T
T
Hayashida
K
K
Uehara
T
T
D000553:Ambulatory Care; D006801:Humans; D008961:Models, Structural; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D015635:Radionuclide Ventriculography / Q000295:instrumentation*