Electrocardiogram monitoring lead wire and magnetic resonance imaging system

The invention provides an electrocardiogram monitoring lead wire and a magnetic resonance imaging system. The electrocardiograph monitoring lead wire comprises an electrocardiograph monitoring lead wire body; the first outer shielding layer covers the outer part of the inner section of the electrocardiograph monitoring lead wire body; and the connecting end of the grounding connecting piece is connected with the first outer shielding layer. According to the electrocardiograph monitoring lead wire, the electrocardiograph monitoring lead wire body extends into the shielding cabin and is connected with a patient placed in the shielding cabin and the electrocardiograph monitor placed outside the shielding cabin, so that the collected electrocardiosignals of the patient are transmitted to the electrocardiograph monitor, and electrocardiograph monitoring is achieved; conductive connection between the first outer shielding layer and the shielding cabin is achieved through the grounding connecting piece, electrocardi