Avtor/Urednik | Kirn, Borut | |
Naslov | Error evaluation of ventricular mechanisms measurement in patients with discoordinate ventricular contraction | |
Tip | članek | |
Vol. in št. | Letnik 3 | |
Leto izdaje | 2014 | |
Jezik | eng | |
Abstrakt | In patients with discoordinate ventricular contraction, accurate identification of local mechanics from all heart regions is essential. Current measurement techniques are imperfect because a large part of the ventricular wall may be excluded, resulting in non-physiological average strain. In order to evaluate this error, we propose to compare the measured average strain to a reference strain obtained by averaging through a series of measurements. We assessed magnetic resonance (MR)-tagged images and determined circumferential strain in 160 regions of the ventricular wall in 10 patients with idiopathic dilated cardiomyopathy and left bundle branch block and 9 healthy volunteers. For each subject a global strain was calculated as the average of all measured strains. Then a reference strain was determined as the average of global strains for both experimental groups. The reference strains of a patient group and healthy controls both had a physiological pattern, with a peak shortening of -0.034 and -0.15, respectively. A large difference between the measured global strain and the reference strain indicates measurements which have large regions of ventricular wall which are excluded in the measurements. | |
Proste vsebinske oznake | ventricular contraction measurement techniques reference strain krčenje prekata merilne metode referenčni sev |