Pannexin 1 (Panx1) is a high-conductance, voltage-sensitive ion channels that exhibit flexible gating behavior upon activation, enabling the passage of ions such as Ca2+, Na⁺, K⁺, and ATP. Panx1 is expressed in cardiac tissue, but its role in ATP release and electrophysiological processes affecting cardiac function is not fully understood. Researchers from Vanderbilt University Medical Center have found that in isolated ventricular cardiomyocytes, Panx1 activation during spontaneous sarco/endoplasmic reticulum Ca2+ release amplified the NCX-driven transient inward current.