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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 5, Iss. 5 — May. 1, 2014
  • pp: 1616–1625

Optical assessment of the cardiac rhythm of contracting cardiomyocytes in vitro and a pulsating heart in vivo for pharmacological screening

Yu-Cheng Lai, Wei-Tien Chang, Kuen-You Lin, and Ian Liau  »View Author Affiliations


Biomedical Optics Express, Vol. 5, Issue 5, pp. 1616-1625 (2014)
http://dx.doi.org/10.1364/BOE.5.001616


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Abstract

Our quest in the pathogenesis and therapies targeting human heart diseases requires assessment of the contractile dynamics of cardiac models of varied complexity, such as isolated cardiomyocytes and the heart of a model animal. It is hence beneficial to have an integral means that can interrogate both cardiomyocytes in vitro and a heart in vivo. Herein we report an application of dual-beam optical reflectometry to determine noninvasively the rhythm of two representative cardiac models–chick embryonic cardiomyocytes and the heart of zebrafish. We probed self-beating cardiomyocytes and revealed the temporally varying contractile frequency with a short-time Fourier transform. Our unique dual-beam setup uniquely records the atrial and ventricular pulsations of zebrafish simultaneously. To minimize the cross talk between signals associated with atrial and ventricular chambers, we particularly modulated the two probe beams at distinct frequencies and extracted the signals specific to individual cardiac chambers with phase-sensitive detection. With this setup, we determined the atrio-ventricular interval, a parameter that is manifested by the electrical conduction from the atrium to the ventricle. To demonstrate pharmacological applications, we characterized zebrafish treated with various cardioactive and cardiotoxic drugs, and identified abnormal cardiac rhythms and atrioventricular (AV) blocks of varied degree. In light of its potential capability to assess cardiac models both in vitro and in vivo and to screen drugs with cardioactivity or toxicity, we expect this approach to have broad applications ranging from cardiopharmacology to developmental biology.

© 2014 Optical Society of America

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.2655) Medical optics and biotechnology : Functional monitoring and imaging

ToC Category:
Cardiovascular Applications

History
Original Manuscript: February 10, 2014
Revised Manuscript: April 15, 2014
Manuscript Accepted: April 15, 2014
Published: April 23, 2014

Citation
Yu-Cheng Lai, Wei-Tien Chang, Kuen-You Lin, and Ian Liau, "Optical assessment of the cardiac rhythm of contracting cardiomyocytes in vitro and a pulsating heart in vivo for pharmacological screening," Biomed. Opt. Express 5, 1616-1625 (2014)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-5-5-1616


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