The model — so realistic its four chambers beat in the same asymmetrical rhythm on screen as does a real heart in the human body — is the work of three British doctors who say the creation will improve both training and care during surgery. The three-dimensional model’s intricate details coupled with life-like animation that doctors can easily manipulate make the cyber heart unique, said Sue Wright, an anesthesiologist at the Heart Hospital in London who helped design the heart. These limitations make it harder to teach students how to perform a complicated ultrasound scan of the heart that entails guiding a probe down through the throat to the stomach. During a recent demonstration, Wright showed how a few mouse clicks allows a doctor to examine the inside or outside walls and intricate structures of the heart, which pumps about five liters of blood per minute. They also analyzed hundreds of previous models and enlisted a company known for its work on films to provide the technical know-how to translate the data they had gathered into a software program to power the virtual heart on screen.

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