Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1967 5
1968 7
1969 6
1970 4
1971 8
1972 5
1973 4
1974 7
1975 9
1976 17
1977 12
1978 10
1979 6
1980 3
1981 9
1982 7
1983 6
1984 8
1985 5
1986 16
1987 12
1988 11
1989 1
1990 9
1993 1
1997 1
2024 0

Text availability

Article attribute

Article type

Publication date

Search Results

189 results

Results by year

Filters applied: . Clear all
Page 1
His bundle electrogram.
Rosen KM, Scherlag BJ, Samet P, Helfant RH. Rosen KM, et al. Among authors: helfant rh. Circulation. 1972 Oct;46(4):831-2. doi: 10.1161/01.cir.46.4.831-a. Circulation. 1972. PMID: 5072785 No abstract available.
Hypokalemia and arrhythmias.
Helfant RH. Helfant RH. Am J Med. 1986 Apr 25;80(4A):13-22. doi: 10.1016/0002-9343(86)90336-0. Am J Med. 1986. PMID: 3706349 Free article.
Intravascular ultrasound cross-sectional arterial imaging.
Siegel RJ, Bessen M, Chae J, Potkin B, Coll G, Fishbein MC, Helfant RH. Siegel RJ, et al. Among authors: helfant rh. Echocardiography. 1990 May;7(3):181-92. doi: 10.1111/j.1540-8175.1990.tb00363.x. Echocardiography. 1990. PMID: 10171129 Review.
Coronary spasm.
Helfant RH. Helfant RH. Am J Cardiol. 1979 Oct 22;44(5):839-41. doi: 10.1016/0002-9149(79)90207-8. Am J Cardiol. 1979. PMID: 495490 No abstract available.
Diphenylhydantoin toxicity.
Helfant RH, Scherlag BJ, Damato AN. Helfant RH, et al. JAMA. 1967 Sep 11;201(11):894. JAMA. 1967. PMID: 6071915 No abstract available.
Coronary arteriography.
Helfant RH. Helfant RH. Am Fam Physician. 1971 Nov;4(5):75-81. Am Fam Physician. 1971. PMID: 5315754 No abstract available.
Timing of surgery for valvular heart disease.
Gray RJ, Helfant RH. Gray RJ, et al. Among authors: helfant rh. Cardiovasc Clin. 1993;23:209-31. Cardiovasc Clin. 1993. PMID: 8416123 Review. No abstract available.
189 results