The Russian Register on the use of intravascular imaging and physiology techniques: two-year results

Abstract

Objective. To analyze the data of the Russian Register on the use of intravascular imaging and physiology techniques over two years of work. Methods. Compared to 2021, twice as many completed forms were entered into the Register in 2022 – 5335 in 2576 patients. By the end of 2022, the total database of the Register included 7967 intravascular examinations. The database design and content continued to be improved; definitions for a range of items were detailed or clarified. New types of examinations and new transducers available on the Russian market were added. Results. In 2022, 20 hospital departments from 11 Russian cities had participated in the Register, which is 1.5 times more than in 2021. The average number of examinations per patient increased to 2.05 compared to 1.96 in 2021. The ratio between different examinations has changed, too. In 2022, proportion of IVUS had increased from 37% to 53% (47% in average for 2­year period), and proportion of OCT had decreased from 23% to 9% (14% in average). The proportion of FFR in various modifications remained roughly the same, making 39% at average. The departments began to use new types of examinations ­ HD IVUS, RFR, DFR. A high proportion (20%) of examinations for ACS remains, and 2% of examinations relates to non­coronary diseases. The largest number of examinations was performed at the initial phase of surgery, determining the strategy and tactics of intervention, followed by primary diagnostic examinations and final control during surgery. Conclusions. The second year of the Register operation confirmed its relevance, representativeness and great potential for nationwide fact­based analysis for both scientific and practical purposes. Expansion of the number of participants and improvement of the Register structure are suggesting of its growing importance. Keywords: Intravascular Ultrasound (IVUS), Fractional Flow Reserve (FFR), Instantaneous Wave­free Ratio (iFR), angiography, coronarography, co­registration, coronary artery stenting, intravascular diagnostic techniques, intravascular imaging and physiology techniques