Coronary bifurcations are encountered in about 15 - 20% of percutaneous coronary interventions (PCI). They are considered technically challenging and associated with worse clinical outcomes than non-bifurcation lesions. Percutaneous coronary intervention (PCI) to the target bifurcation lesion. Randomization (by means envelope randomization) to investigational device: Group 1 for BiOSS LIM C implantation vs Group 2 for any DES implantation.

Single stent implantation in the main vessel-main branch across a side branch is the default strategy (provisional T-stenting, PTS) in all patients enrolled. Bifurcation lesions are assessed according to Medina classification using an index of 1 for stenosis greater than 50% and 0 for no stenosis (visual estimation). There is no restriction regarding lesion length in patient selection. If required, additional stent can be implanted (Alex Plus in the BiOSS Lim C Group). A stent in a side branch (Alex Plus in the BiOSS Lim C Group) should be implanted only if there is proximal residual stenosis greater than 70% after balloon dilatation and/or significant flow impairment after main vessel - main branch stenting and/or a flow limiting dissection.

The implantation protocol for bifurcation is as follows:

1. wiring of both branches;
2. main vessel predilatation and/or side branch predilatation according to the operator's decision;
3. stent implantation (inflation for at least 20 s);
4. proximal optimization technique (POT)
5. side branch postdilatation/side branch stent implantation if necessary
6. final kissing balloon inflation at operator's discretion.
7. Second proximal optimization technique (re-POT)

Inclusion Criteria:

1. Subject at least 18 years of age.
2. Subject able to verbally confirm understandings of risks, benefits of receiving PCI for true bifurcation lesions, and he/she or his/her legally authorized representative provides written informed consent prior to any study related procedure.
3. Target main branch lesion(s) located in a native coronary artery with diameter of ≥ 2.5 mm and ≤ 4.5 mm. Target side branch lesion(s) located in a native coronary artery with diameter of ≥ 2.0 mm.
4. Target lesion(s) amenable for PCI with balloon angioplasty of the side branch.

Exclusion Criteria:

1. Non-cardiac co-morbid conditions are present with life expectancy <1 year or that may result in protocol non-compliance (per site investigator's medical judgment).
2. Subjects who refuse to give informed consent.
3. Subjects with LVEF<30%
4. Subjects with moderate or severe degree valvular heart disease or primary cardiomyopathy
5. Distal LM stenosis