‘You could be right,’ she said at last. ‘It fits.’

‘I’ll run tests straight away,’ he said. ‘There’s not a lot more we can do about it now, though. And at least it takes away the risks of clotting.’

‘Mmm.’

Silence. The tension was well nigh unbearable. She was measuring the pressures in the right ventricle and the pulmonary artery by placing the catheter tip in each area. It was a tricky procedure in an adult, but in a newborn…

‘My face,’ Gina muttered, and Jill saw her need and stepped forward to wipe sweat beads from above her eyes.

She was good, Cal thought grimly. Good enough?

The work went on. The child’s tiny heart kept beating. Emily was fighting with everything she had. She had a paediatric anaesthetist on the line from the city, and she was working with a headset. Her soft voice asking questions was the only sound as they worked.

Cal had seen this done in adults, but he’d never seen the procedure in one so tiny. As a general surgeon he would never think of doing such a procedure himself. He couldn’t, he acknowledged. Somewhere along the line Gina had acquired skills that could only make him wonder.

Gina was working out diameters now, her eyes moving from fingers to monitor, fingers to monitor, and he could almost see her brain doing the complex calculations as she worked out the next step forward.

She was brilliant. An amazing surgeon.

The mother of his son?

‘Now the wire,’ she said into the stillness, and the sound of her voice almost made him start.

Back to silence.

The balloon valvuloplasty catheter was threaded over the wire, painstakingly positioned so its centre was just at the valve. That was the hard part.

Now came the hardest.

Please…

‘Let’s try,’ Gina said into a silence that was close to unbearable. ‘I think…’

The balloon was inflated, showing on the monitor under fluoroscopy, with Gina watching that it remained centred all the time. The balloon had been manoeuvred right to the valve. Now it was stretching the valve, much as a shoe was stretched by a cobbler, hoping that once the stretching was done the valve would self-correct. The pressures would equalise.