The experiment is beautiful, but…
The genetic pacemaker works from light
(It is worth noting, however, that a year ago, colleagues of the inventors of this pretentious method, after practicing on guinea pigs, tested on pigs the method of direct conversion of cardiomyocytes into cells that generate electrical impulses. And imagine what would happen if the chest laser suddenly runs out of battery… So the work is undoubtedly elegant, but whether it will reach the implementation is doubtful – VM.)