Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
181,758
Country Rank
14,029
Institution Rank : 647
![](https://cdn.adscientificindex.com/logos/10902.jpg)
![United Kingdom](/flags/gb.png)
![Umar Sadat](/user/assets/images/profile/no-profile-photo.png)
Cardiovascular medicine and Surgery and Radiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,514
1,657
0.301
* Total Citation Counts Rankings
World Rank
472,301
Country Rank
14,355
Institution Rank : 3,158
![](https://cdn.adscientificindex.com/logos/9794.jpg)
![Brazil](/flags/br.png)
![Marcel Koenigkam Santos](https://cdn.adscientificindex.com/pictures/47/932831.jpg)
Radiology
Chest and Cardiovascular Imaging
Pneumology
Thoracic Surgery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,759
1,115
0.634
* Total Citation Counts Rankings
World Ranking
181,758
Country Ranking
14,029
Institution Ranking
647
Umar Sadat
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,514
1,657
0.301
![](https://cdn.adscientificindex.com/logos/10902.jpg)
Cardiovascular medicine and Surgery and Radiology
* Total Citation Counts Rankings
World Ranking
472,301
Country Ranking
14,355
Institution Ranking
3,158
Marcel Koenigkam Santos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,759
1,115
0.634
![](https://cdn.adscientificindex.com/logos/9794.jpg)
Radiology
Chest and Cardiovascular Imaging
Pneumology
Thoracic Surgery