Sneezing can change the rhythm of your heartbeat but never stop your heart from throbbing.
Variable pressure at the chest level before and during sneezing changes the speed of the blood circulation, which can speed up the pattern of heartbeat.
The belief that sneezing stops the heart is not a new belief, and some believe that the source of this belief is that brief period of time before sneezing directly, giving the impression that the whole body stopped working, including the heart.
Sneezing begins with a tickling sensation in the nerve endings that send a signal to the brain that it needs to get rid of an annoying body lining the nose (dust, pollen ...).
First, there is long and deep inspiration then keeps that breath, which tightens the muscles of the chest. The air pressure in your lungs increases, your eyes become closed, your tongue touches the ceiling of your mouth cavity, and there is a sudden, strong exhalation or what you call a dizziness as fast as 150 km / h.
References:
https://www.verywell.com/myths-and-fact-about-sneezing-2328796
https://uamshealth.com/healthlibrary2/medicalmyths/heartmyth/
Cool info! I didn't know this.