Pacemaker current
ELECTRIC CURRENT IN THE HEART THAT FLOWS THROUGH THE FUNNY CHANNEL (WHICH COMPRISES THE HCN CHANNELS, THAT IS, PACEMAKER CHANNELS)
Funny channel; Funny current
The pacemaker current (or If, or IKf, also referred to as the funny current) is an electric current in the heart that flows through the HCN channel or pacemaker channel. Such channels are important parts of the electrical conduction system of the heart and form a component of the natural pacemaker.