Citation Rankings
Highly Cited Researchers

National Heart Hospital Highly Cited Researchers Citation Rankings 2025

The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.

* Total Citation Counts Rankings
Ranking Based On Selection :1
Bulgaria
Tchavdar Shalganov
Cardiology
Cardiac arrhythmias
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,216
23,110
0.791
* Total Citation Counts Rankings
Ranking Based On Selection :2
Bulgaria
Iva Paskaleva
coagulation
DOAC
cardiac markers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
126
20
0.159
* Total Citation Counts Rankings
Ranking Based On Selection :3
Bulgaria
Valentina Ignatova
neurology
neurophysiology
neuropsychology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47
44
0.936
* Total Citation Counts Rankings
Ranking Based On Selection :4
Bulgaria
Nadelin Nikolov
vascular surgery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33
27
0.818
* Total Citation Counts Rankings
Rankings
23,250
Bulgaria
8
1
Ranking Based On Selection: 1
Tchavdar Shalganov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,216
23,110
0.791
* Total Citation Counts Rankings
Rankings
1,484,972
Bulgaria
2,508
2
Ranking Based On Selection: 2
Iva Paskaleva
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
126
20
0.159
coagulation
DOAC
cardiac markers
* Total Citation Counts Rankings
Rankings
1,841,321
Bulgaria
3,584
3
Ranking Based On Selection: 3
Valentina Ignatova
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47
44
0.936
* Total Citation Counts Rankings
Rankings
1,944,638
Bulgaria
3,845
4
Ranking Based On Selection: 4
Nadelin Nikolov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33
27
0.818