I can't tell if you're being genuine or snarky.
I know dozens of pediatric cardiologists that are women.
I do only know one interventionalist, personally, that is a woman, (one of my best friends from residency) but I don't think she's some sort of rare exception.
Perhaps, as a PICU attending, my sample is skewed, but I wouldn't consider pediatric cardiology in general to be a terrible lifestyle. Certainly the cardiac intensivists have a rough go, particularly as it's finding its footing as a field and only able to gradually fill in the available jobs. But I wouldn't say that general cardiology, or imaging, or EP is any worse than say Heme/Onc in terms of lifestyle. Fellowship is harder than most other fields, and there are certainly groups out there that run lean and expect you to work a lot as an attending. Truthfully, I think the greatest burden of extra pressure for pediatric cardiologists is the research component and finding time to make that happen in the midst of a significant clinical load. Even in pediatric programs that as a whole don't have a lot of pressure to publish, you can assume that the cardiology group will have a high research output.
Interventional cardiologists do run the risk of needing to be called in the middle of the night for a emergent balloon septostomy - but that's about the only emergent procedure any more, and they generally aren't the ones getting phone calls in the middle of the night for other reasons - post-procedure kids are usually monitored in the CICU or PICU so the intensivists are doing the monitoring. Imaging attendings will likely be called in as frequently in the middle of the night for intra-op heart transplant TEE's, while their phone call load probably depends on the way they staff things for fellows. EP attendings are likely to take more phone calls but rarely have to come in during the middle of the night, but again, depends on staffing expectations and who is supposed to manage what. Where I did fellowship, we had very vocal EP attendings and so they were more involved and got more phone calls.
In general, I feel that most pediatric cardiologists do enjoy their work - most people who get into the field have known they wanted to do it for a long period of time and have put in a lot of work to make it into that field. Because it is so competitive and because it tends to draw some of the best and brightest, it holds a lot of cachet within the pediatric world. Like many other pediatric specialties, people who are in it, tend to point to a number of things that drew them to the field and kept them there.
