Background and Objectives: The revascularization strategy for percutaneous coronary intervention (PCI) in patients with multivessel (MV) acute coronary syndrome (ACS) remains controversial. Certain gaps in the evidence are related to the optimal timing of non-culprit lesion revascularization and the utility of instantaneous wave-free ratio (iFR) in the management of MV ACS intervention. The major benefits of iFR utilization in MV ACS patients in one-stage complete revascularization are: (1) the possibility to virtually plan the PCI, both the location and the extension of the necessary stenting to achieve the prespecified final hemodynamic result; (2) the opportunity to validate the final hemodynamic result of the PCI, both in culprit artery and all non-culprit arteries and (3) the value of obliviating the uncomfortable, costly, time consuming and sometimes deleterious effects from Adenosine, as there is no requirement for administration. Thus, iFR use fosters the achievement of physiologically appropriate complete revascularization in MV ACS patients during acute hospitalization. Materials and Methods: This pilot study was aimed to test the feasibility of a randomized trial research protocol as well as to assess patient safety signals of co-registration iFR-guided one-stage complete revascularization compared with that of standard staged angiography-guided PCI in de novo patients with MV ACS. This was a single-center, prospective, randomized, open-label clinical trial consecutively screening patients with ACS for MV disease. The intervention strategy of interest was iFR-guided physiologically complete one-stage revascularization, in which the virtual PCI planning of non-culprit lesions and the intervention itself were performed in one stage directly following treatment of the culprit lesion and other critical stenosis of more than ninety percent. Seventeen patients were recruited and completed the 3-month follow-up. Results: Index PCI duration was significantly longer while the volume of contrast media delivered in index PCI was significantly greater in the iFR-guided group than in the angiography-guided group (119.4 ± 40.7 vs. 47 ± 15.5 min, p = 0.004; and 360 ± 97.9 vs. 192.5 ± 52.8 mL, p = 0.003). There were no significant differences in PCI-related major adverse cardiovascular events (MACE) between the groups during acute hospitalization and at 3-months follow-up. One-stage iFR-guided PCI requires fewer PCI attempts until complete revascularization than does angiography-guided staged PCI. Conclusions: Complete revascularization with the routine use of the virtual planning tool in one-stage iFR-guided PCI is a feasible practical strategy in an everyday Cath lab environment following the protocol designed for the study. No statistically significant safety signals were documented in the number of PCI related MACE during the 3-month follow-up.

Background: Centralizing pacemaker implantations delays care for geriatric populations in remote regions, particularly in post‐Soviet healthcare systems like Latvia. We hypothesized that a regional hospital could safely establish a high‐volume pacing program to overcome geographical barriers, utilizing structured mentorship from a national tertiary center. Methods: This 2‐year prospective observational study evaluated 173 consecutive patients (mean age 78.1 years) undergoing permanent pacemaker implantation at Daugavpils Regional Hospital. Procedures were performed by two regional interventional cardiologists transitioning to independent practice, supported by Latvian Cardiology Centre mentors. Endpoints included 30‐day major complications, procedural efficiency, surgical learning curve evaluation using Cumulative Sum (CUSUM) analysis, and patient‐reported quality of life (AQUAREL, SF‐36). Results: Across 173 procedures (66.5% dual‐chamber, 33.5% single‐chamber), the overall complication rate was 5.7%. CUSUM analysis demonstrated a complication rate reduction from 8.7% during the initial acquisition phase to a 3.4% expertise plateau. Procedural efficiency stabilized with a mean fluoroscopy time of 3.9 min. Specific complications included lead dislodgement (2.3%), pocket hematoma (1.7%), pneumothorax (1.1%), and wound infection (0.6%), managed successfully without mortality or device abandonment. At 6‐month follow‐up, patients reported significant quality of life improvements and high trust in the regional team. Conclusions: Regional high‐volume cardiac pacing programs are safe and vital for equitable geriatric care. With structured mentorship, regional hospitals can overcome historical centralization, safely transitioning to independent high‐volume centers and achieving an expert‐level safety profile non‐inferior to tertiary standards.