| Home > Articles > Published articles > Recognition of Fibrotic Infarct Density by the Pattern of Local Systolic-Diastolic Myocardial Electrical Impedance |
| Date: | 2016 |
| Abstract: | Myocardial electrical impedance is a biophysical property of the heart that is influenced by the intrinsic structural characteristics of the tissue. Therefore, the structural derangements elicited in a chronic myocardial infarction should cause specific changes in the local systolic-diastolic myocardial impedance, but this is not known. This study aimed to characterize the local changes of systolic-diastolic myocardial impedance in a healed myocardial infarction model. Six pigs were successfully submitted to 150 min of left anterior descending (LAD) coronary artery occlusion followed by reperfusion. 4 weeks later, myocardial impedance spectroscopy (1-1000 kHz) was measured at different infarction sites. The electrocardiogram, left ventricular (LV) pressure, LV dP/dt, and aortic blood flow (ABF) were also recorded. A total of 59 LV tissue samples were obtained and histopathological studies were performed to quantify the percentage of fibrosis. Samples were categorized as normal myocardium (<10% fibrosis), heterogeneous scar (10-50%) and dense scar (. |
| Grants: | Instituto de Salud Carlos III FIS-PI13-00765 Instituto de Salud Carlos III DTS-15-00099 Instituto de Salud Carlos III RIC-RD12-0042-0002] |
| Note: | Altres ajuts: Fundació "La Marató" de TV3 [20150830] |
| Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | Healed myocardial infarction ; Myocardial electrical impedance ; Hemodynamics ; Novel bioimpedance device ; Swine |
| Published in: | Frontiers in physiology, Vol. 7 (august 2016) , ISSN 1664-042X |
10 p, 2.2 MB |