Calcium and voltage imaging in arrhythmia models by high-speed microscopy

C. de Mauro; C. A. Cecchetti; D. Alfieri; G. Borile; A. Urbani; M. Mongillo; F. S. Pavone

doi:10.1117/12.2036973

4 March 2014 Calcium and voltage imaging in arrhythmia models by high-speed microscopy

C. de Mauro, C. A. Cecchetti, D. Alfieri, G. Borile, A. Urbani, M. Mongillo, F. S. Pavone

Proceedings Volume 8926, Photonic Therapeutics and Diagnostics X; 89262W (2014) https://doi.org/10.1117/12.2036973
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

Alterations in intracellular cardiomyocyte calcium handling have a key role in initiating and sustaining arrhythmias. Arrhythmogenic calcium leak from sarcoplasmic reticulum (SR) can be attributed to all means by which calcium exits the SR store in an abnormal fashion. Abnormal SR calcium exit maymanifest as intracellular Ca2+ sparks and/or Ca2+ waves. Ca2+ signaling in arrhythmogenesis has been mainly studied in isolated cardiomyocytes and given that the extracellular matrix influences both Ca2+ and membrane potential dynamics in the intact heart and underlies environmentally mediated changes, understanding how Ca2+ and voltage are regulated in the intact heart will represent a tremendous advancement in the understanding of arrhythmogenic mechanisms. Using novel high-speed multiphoton microscopy techinques, such as multispot and random access, we investigated animal models with inherited and acquired arrhythmias to assess the role of Ca2+ and voltage signals as arrhythmia triggers in cell and subcellular components of the intact heart and correlate these with electrophysiology.

Citation Download Citation

C. de Mauro, C. A. Cecchetti, D. Alfieri, G. Borile, A. Urbani, M. Mongillo, and F. S. Pavone "Calcium and voltage imaging in arrhythmia models by high-speed microscopy", Proc. SPIE 8926, Photonic Therapeutics and Diagnostics X, 89262W (4 March 2014); https://doi.org/10.1117/12.2036973

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KEYWORDS

Calcium

Heart

Microscopy

Multiphoton microscopy

Luminescence

Animal model studies

Tissues

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