An experimental treatment in Zürich

On 16 September 1977, Andreas Grüntzig performed the first successful percutaneous transluminal coronary angioplasty at University Hospital in Zürich. A balloon carried on a catheter widened a narrowing in a coronary artery without an open operation on the chest. The achievement demonstrated that a catheter could become an instrument for treating coronary obstruction, extending its role beyond investigating the heart and its circulation.

The patient was a 38-year-old man with a discrete narrowing in the proximal left anterior descending coronary artery. This carefully selected anatomy mattered: the event established feasibility in a particular case, rather than showing that every coronary obstruction could be treated this way. Cardiac surgeon Marko Turina later recalled preparing an operating room for emergency bypass surgery, which proved unnecessary. His account places the successful procedure within a programme of experimental work, catheter redesign and cooperation between cardiology and surgery. Turina’s participant recollection.

From peripheral vessels to coronary treatment

Grüntzig’s work grew from efforts to reopen narrowed arteries using instruments passed through the circulation. University Hospital Zürich’s institutional history describes his earlier interest in treating narrowed leg vessels with the catheter techniques associated with Charles Dotter. Developing a balloon catheter offered another way to enlarge an arterial passage from within.

The coronary procedure brought this approach into a setting where bypass surgery already provided a means of restoring blood supply around an obstruction. The first patient wished to avoid that operation. Nevertheless, surgical support remained part of the experimental treatment’s safety arrangements. The relationship between the two approaches was therefore cooperative as well as potentially competitive.

The successful intervention attracted international attention. Grüntzig subsequently taught other cardiologists through courses and live case demonstrations, helping turn a locally developed technique into a transferable clinical practice. The history concerns equipment, training and institutional support alongside individual invention. University Hospital Zürich’s historical account.

Early results and unresolved questions

The early clinical evidence was promising but explicitly provisional. In their 1979 report, Grüntzig, Åke Senning and Walter Siegenthaler described treatment of 50 patients over 18 months. They reported technical success in 32 patients. Five patients required emergency bypass surgery after acute clinical deterioration, and three showed electrocardiographic evidence of infarction.

These figures show why the first successful case cannot stand for the entire early experience. The investigators estimated that only about 10–15 percent of candidates for bypass surgery had lesions suitable for their procedure. They also called for a prospective randomized trial comparing angioplasty with surgical and medical management.

Their suggestion that a short history of pain indicated a soft, distensible atheroma belongs to the clinical reasoning of that early report; it should not be treated as a contemporary selection rule. Historically, the report is valuable because enthusiasm and caution coexist within it. The investigators distinguished an immediate improvement in arterial narrowing from the broader question of comparative clinical usefulness. Original 1979 clinical report.

Patient experience, follow-up and legacy

A follow-up account published in 2001 adds the patient’s experience to the technical narrative. It describes Grüntzig explaining the experimental alternative and the possibility of immediate bypass surgery if difficulties arose. The patient agreed, and the procedure relieved his symptoms. When coronary angiography was repeated in 2000 after recurrent chest discomfort, the previously treated site remained patent. The first patient’s 23-year follow-up.

That durable result is striking, but it remains the history of one selected patient. It cannot independently establish the expected outcome for other patients or settle comparisons between different treatments. Reading the follow-up alongside the early series reveals two different kinds of evidence: an unusually long individual observation and a broader account containing failures and complications.

The event’s significance lies in opening a practical route to catheter-based coronary treatment while making patient selection, emergency support and comparative evaluation unavoidable questions. It belongs within the wider history of cardiology and heart surgery. This account describes a historical experiment and its evidence; the techniques and decisions recorded here are not instructions for present-day medical care.

Historical evidence and further reading