Rotors and the dynamics of cardiac fibrillation

SV Pandit, J Jalife - Circulation research, 2013 - Am Heart Assoc
The objective of this article is to present a broad review of the role of cardiac electric rotors
and their accompanying spiral waves in the mechanism of cardiac fibrillation. At the outset …

Nonlinear and stochastic dynamics in the heart

Z Qu, G Hu, A Garfinkel, JN Weiss - Physics reports, 2014 - Elsevier
In a normal human life span, the heart beats about 2–3 billion times. Under diseased
conditions, a heart may lose its normal rhythm and degenerate suddenly into much faster …

Low-energy defibrillation with nanosecond electric shocks

F Varghese, JU Neuber, F Xie, JM Philpott… - Cardiovascular …, 2017 - academic.oup.com
Aims Reliable defibrillation with reduced energy deposition has long been the focus of
defibrillation research. We studied the efficacy of single shocks of 300 ns duration in …

Spatial phase discontinuity at the center of moving cardiac spiral waves

N Tomii, M Yamazaki, T Ashihara, K Nakazawa… - Computers in Biology …, 2021 - Elsevier
Background Precise analysis of cardiac spiral wave (SW) dynamics is essential for effective
arrhythmia treatment. Although the phase singularity (PS) point in the spatial phase map has …

Calmodulin/CaMKII inhibition improves intercellular communication and impulse propagation in the heart and is antiarrhythmic under conditions when fibrosis is …

H Takanari, VJA Bourgonje, MSC Fontes… - Cardiovascular …, 2016 - academic.oup.com
Aim In healthy hearts, ventricular gap junctions are mainly composed by connexin43 (Cx43)
and localize in the intercalated disc, enabling appropriate electrical coupling. In diseased …

Detection algorithm of phase singularity using phase variance analysis for epicardial optical mapping data

N Tomii, M Yamazaki, T Arafune… - IEEE Transactions …, 2015 - ieeexplore.ieee.org
Objective: Spiral reentry is a recognized cause of tachycardia. Detection and tracking of the
spiral core are essential for understanding the spiral wave dynamics. The core of the spiral …

Validation of intraoperative catheter phase mapping using a simultaneous optical measurement system in rabbit ventricular myocardium

N Tomii, K Asano, H Seno, T Ashihara, I Sakuma… - Circulation …, 2020 - jstage.jst.go.jp
Background: Recently, an interoperative catheter electrode mapping system, termed ExTRa
Mapping (EXT), was developed for precise diagnosis and effective treatment of non …

Regional cooling facilitates termination of spiral-wave reentry through unpinning of rotors in rabbit hearts

M Yamazaki, H Honjo, T Ashihara, M Harada, I Sakuma… - Heart rhythm, 2012 - Elsevier
BACKGROUND: Moderate global cooling of myocardial tissue was shown to destabilize 2-
dimensional (2-D) reentry and facilitate its termination. OBJECTIVE: This study sought to test …

The role of gap junctions in stretch-induced atrial fibrillation

N Ueda, M Yamamoto, H Honjo, I Kodama… - Cardiovascular …, 2014 - academic.oup.com
Aims The aim of this study was to investigate the role of gap junctions in atrial fibrillation (AF)
by analysing the effects of a gap junction enhancer and blocker on AF vulnerability and …

Rate-dependent shortening of action potential duration increases ventricular vulnerability in failing rabbit heart

M Harada, Y Tsuji, YS Ishiguro… - American Journal …, 2011 - journals.physiology.org
Congestive heart failure (CHF) predisposes to ventricular fibrillation (VF) in association with
electrical remodeling of the ventricle. However, much remains unknown about the rate …