
By SAURABH JHA, MD
The reactions of physicians to ORBITA, a blinded, randomized controlled trial (RCT) from Britain, with a sham arm, comparing percutaneous coronary intervention (PCI) to placebo, in patients with stable angina, are as fascinating as the cardiac cycle. There were murmurs, kicks, and pulsating jugulars. Though many claimed to be surprised, and many unsurprised, by the null results of the trial, the responses were predictably predictable. Some basked in playful schadenfreude, and some became defensive and bisferious.
No shame in sham
The coverage of the trial in the NY Times was predictably jejune and hyperbolic. Predictably, the most nuanced and divergent viewpoints were curated by Larry Husten. Predictably, medical Twitter was set alight. The trial vindicated Vinay Prasad and Adam Cifu who predicted that PCI for stable angina will get placeboed, in their popular book, Ending Medical Reversal. Prasad and Cifu are tireless advocates for using sham control trials to judge the true efficacy of procedures, such as PCI, in relieving symptoms, and reject the notion that invasive placebos are unethical. There’s no shame in sham, they say. They were right.
The Objective Randomized Blinded Investigation With Optimal Medical Therapy in Stable Angina (ORBITA) is an impressive trial, which enrolled 230 patients with stable angina and single vessel stenosis greater than 70 %. The vast majority had class 2 (59 %) and class 3 (39 %) angina. Majority of the patients, 70 %, had LAD lesions. If you look in the appendix, which has pictures of catheter angiograms of all patients, you’ll see scary tight proximal LAD stenosis – yes, even these patients had 50 % chance of getting sham. This takes balls. The trialists deserve applause, as do the Brits who volunteered. These were no snowflakes.

I attended a Population Health conference this summer where a number of representatives from large health systems and physician organizations convened to discuss common challenges. Many of my healthcare colleagues assume that anything that carries the label “Population Health” must relate to health disparities and food deserts. While we do address these topics, the vast majority of sessions and conversations had one underlying theme: lowering the total cost of care.