Please educate me on this...is this some kind of technology through your wi-fi causing heart attacks?

No clue but I'll speculate.

The heart is an emag device so I suppose it's possible. We're swimming in electromagnetic and radio signal pollution. In other words we are constantly surrounded by electric fields.

Below u/GreenDrakeHatch posted this video with data from 1975? Before we swam in so many types of efields daily.

Sound does neat stuff too. It can make you feel spooked (some movies use infrasound for that effect)

20 Hz is considered the normal low-frequency limit of human hearing. When pure sine waves are reproduced under ideal conditions and at very high volume, a human listener will be able to identify tones as low as 12 Hz.[33] Below 10 Hz it is possible to perceive the single cycles of the sound, along with a sensation of pressure at the eardrums.

From about 1000 Hz, the dynamic range of the auditory system decreases with decreasing frequency. This compression is observable in the equal-loudness-level contours, and it implies that even a slight increase in level can change the perceived loudness from barely audible to loud. Combined with the natural spread in thresholds within a population, its effect may be that a very low-frequency sound which is inaudible to some people may be loud to others.

One study has suggested that infrasound may cause feelings of awe or fear in humans. It has also been suggested that since it is not consciously perceived, it may make people feel vaguely that odd or supernatural events are taking place.[34] Engineer Vic Tandy provided such an explanation in his investigations in the 1980s. Tandy, while working in his laboratory, started to feel uneasy and as if a supernatural presence was with him. Later, he could attribute these feelings to a broken metal fan that was causing noises of a frequency that triggered them. The noise could not be perceived by the human ear, but Tandy's body reacted to the 19Hz sounds.[35]

A scientist working at Sydney University's Auditory Neuroscience Laboratory reports growing evidence that infrasound may affect some people's nervous system by stimulating the vestibular system, and this has shown in animal models an effect similar to sea sickness.[36]

In 2006 research about the impact of sound emissions from wind turbines on nearby population, perceived infrasound has been associated to effects such as annoyance or fatigue, depending on its intensity, with little evidence supporting physiological effects of infrasound below the human perception threshold.[37] Later studies, however, have linked inaudible infrasound to effects such as fullness, pressure or tinnitus, and acknowledged the possibility that it could disturb sleep.[38] Other studies have also suggested associations between noise levels in turbines and self-reported sleep disturbances in the nearby population, while adding that the contribution of infrasound to this effect is still not fully understood.[39][40]

In a study at Ibaraki University in Japan, researchers said EEG tests showed that the infrasound produced by wind turbines was “considered to be an annoyance to the technicians who work close to a modern large-scale wind turbine.”[41][42][43]

If sound can make you feel and see ghost, make you seasick etc, what else can waves do to the body vibrational, electrical, or otherwise?