Multiple studies demonstrate that acute alcohol consumption alters autonomic regulation of the heart, resulting in changes to resting heart rate and significant reductions in heart rate variability.
The retrieved papers [0], [3], and [8] directly investigate the physiological and cardiovascular effects of alcohol intake. They consistently show that alcohol consumption alters heart rate, pulse dynamics, and heart rate variability (HRV), supporting the claim that alcohol consumption alters heartbeat pulse strength and rhythm. None of the papers refute this claim.