Inadequacy of the gorlin formula for predicting prosthetic valve area
A total of 135 patients with normally functioning prosthetic aortic valves who were catheterized 6 months after placement of Hancock, modified Hancock or Bjork-Shiley prostheses were studied to determine the magnitude of error in Gorlin formula estimates of prosthetic aortic valve area. All patients...
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| Veröffentlicht in: | The American journal of cardiology 1988-07, Vol.62 (1), p.113-116 |
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| container_title | The American journal of cardiology |
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| creator | Cannon, Scott R. Richards, Kent L. Crawford, Michael H. Folland, Edward D. Pierpont, Gordon Sethi, Gulshan K. Hammermeister, Karl E. |
| description | A total of 135 patients with normally functioning prosthetic aortic valves who were catheterized 6 months after placement of Hancock, modified Hancock or Bjork-Shiley prostheses were studied to determine the magnitude of error in Gorlin formula estimates of prosthetic aortic valve area. All patients were male, selected from 13 participating hospitals and routinely followed after valve replacement for 5 years. Hemodynamically determined Gorlin valve areas were compared with independently verified actual valve areas. Actual Hancock areas were measured from videotapes of valves exercised in a pulse duplicator flow model. Actual Bjork-Shiley areas were calculated directly from the valves' inner ring radius. Gorlin valve areas correlated poorly with actual valve areas (r = 0.39). The mean Gorlin formula error was 0.36 cm2 (standard deviation = 0.32). Gorlin areas overestimated actual areas by >0.25 cm2 in 43 patients (32%) and underestimated actual areas by >0.25 cm2 in 29 (21%). It was concluded that the Gorlin formula inaccurately predicts prosthetic valve area in the aortic position. Overreliance on this formula in assessing aortic stenosis could lead to errant clinical decisions. |
| doi_str_mv | 10.1016/0002-9149(88)91374-4 |
| format | Article |
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All patients were male, selected from 13 participating hospitals and routinely followed after valve replacement for 5 years. Hemodynamically determined Gorlin valve areas were compared with independently verified actual valve areas. Actual Hancock areas were measured from videotapes of valves exercised in a pulse duplicator flow model. Actual Bjork-Shiley areas were calculated directly from the valves' inner ring radius. Gorlin valve areas correlated poorly with actual valve areas (r = 0.39). The mean Gorlin formula error was 0.36 cm2 (standard deviation = 0.32). Gorlin areas overestimated actual areas by >0.25 cm2 in 43 patients (32%) and underestimated actual areas by >0.25 cm2 in 29 (21%). It was concluded that the Gorlin formula inaccurately predicts prosthetic valve area in the aortic position. Overreliance on this formula in assessing aortic stenosis could lead to errant clinical decisions.</description><identifier>ISSN: 0002-9149</identifier><identifier>EISSN: 1879-1913</identifier><identifier>DOI: 10.1016/0002-9149(88)91374-4</identifier><identifier>PMID: 3381730</identifier><identifier>CODEN: AJCDAG</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>Aortic Valve - pathology ; Aortic Valve - physiopathology ; Aortic Valve Stenosis - pathology ; Biological and medical sciences ; Cardiac Catheterization ; Cardiac Output ; Cardiology. Vascular system ; Endocardial and cardiac valvular diseases ; Heart ; Heart Valve Prosthesis ; Humans ; Medical sciences ; Videotape Recording</subject><ispartof>The American journal of cardiology, 1988-07, Vol.62 (1), p.113-116</ispartof><rights>1988</rights><rights>1991 INIST-CNRS</rights><rights>1988 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c482t-91d456e69cc78783a732648f98166475812782d5bf8fc2daf8aa233ea81189cd3</citedby><cites>FETCH-LOGICAL-c482t-91d456e69cc78783a732648f98166475812782d5bf8fc2daf8aa233ea81189cd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/0002914988913744$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=19567726$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7725438$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/3381730$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Cannon, Scott R.</creatorcontrib><creatorcontrib>Richards, Kent L.</creatorcontrib><creatorcontrib>Crawford, Michael H.</creatorcontrib><creatorcontrib>Folland, Edward D.</creatorcontrib><creatorcontrib>Pierpont, Gordon</creatorcontrib><creatorcontrib>Sethi, Gulshan K.</creatorcontrib><creatorcontrib>Hammermeister, Karl E.</creatorcontrib><creatorcontrib>Participants in the Veterans Administration Cooperative Study on Valvular Heart Disease</creatorcontrib><title>Inadequacy of the gorlin formula for predicting prosthetic valve area</title><title>The American journal of cardiology</title><addtitle>Am J Cardiol</addtitle><description>A total of 135 patients with normally functioning prosthetic aortic valves who were catheterized 6 months after placement of Hancock, modified Hancock or Bjork-Shiley prostheses were studied to determine the magnitude of error in Gorlin formula estimates of prosthetic aortic valve area. All patients were male, selected from 13 participating hospitals and routinely followed after valve replacement for 5 years. Hemodynamically determined Gorlin valve areas were compared with independently verified actual valve areas. Actual Hancock areas were measured from videotapes of valves exercised in a pulse duplicator flow model. Actual Bjork-Shiley areas were calculated directly from the valves' inner ring radius. Gorlin valve areas correlated poorly with actual valve areas (r = 0.39). The mean Gorlin formula error was 0.36 cm2 (standard deviation = 0.32). Gorlin areas overestimated actual areas by >0.25 cm2 in 43 patients (32%) and underestimated actual areas by >0.25 cm2 in 29 (21%). It was concluded that the Gorlin formula inaccurately predicts prosthetic valve area in the aortic position. Overreliance on this formula in assessing aortic stenosis could lead to errant clinical decisions.</description><subject>Aortic Valve - pathology</subject><subject>Aortic Valve - physiopathology</subject><subject>Aortic Valve Stenosis - pathology</subject><subject>Biological and medical sciences</subject><subject>Cardiac Catheterization</subject><subject>Cardiac Output</subject><subject>Cardiology. Vascular system</subject><subject>Endocardial and cardiac valvular diseases</subject><subject>Heart</subject><subject>Heart Valve Prosthesis</subject><subject>Humans</subject><subject>Medical sciences</subject><subject>Videotape Recording</subject><issn>0002-9149</issn><issn>1879-1913</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kE1LxDAQhoMoun78A4UeVPRQbZo0mV4EEb9A8KLnMKYTjXRbTdoF_72pu-zR02SYZyYvD2OHvLjgBVeXRVGUec1lfQZwXnOhZS432IyDrnOe-k02WyM7bDfGz9RyXqltti0EcC2KGbt97LCh7xHtT9a7bPig7L0Pre8y14f52OJUs69AjbeD797Ts4-JGrzNFtguKMNAuM-2HLaRDlZ1j73e3b7cPORPz_ePN9dPuZVQDilJIytFqrZWgwaBWpRKgquBKyV1BbzUUDbVmwNnywYdIJZCEALnUNtG7LHT5d2U4nukOJi5j5baFjvqx2jSdgWqkgmUS9CmuDGQM1_BzzH8GF6YyZ6Z1JhJjQEwf_bMtHa0uj--zalZL610pfnxao7RYusCdtbHNaZ1mf6GhJ38h_G6UglVibtacpScLTwFE62nzibZgexgmt7_n_cXTQmW8A</recordid><startdate>19880701</startdate><enddate>19880701</enddate><creator>Cannon, Scott R.</creator><creator>Richards, Kent L.</creator><creator>Crawford, Michael H.</creator><creator>Folland, Edward D.</creator><creator>Pierpont, Gordon</creator><creator>Sethi, Gulshan K.</creator><creator>Hammermeister, Karl E.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19880701</creationdate><title>Inadequacy of the gorlin formula for predicting prosthetic valve area</title><author>Cannon, Scott R. ; Richards, Kent L. ; Crawford, Michael H. ; Folland, Edward D. ; Pierpont, Gordon ; Sethi, Gulshan K. ; Hammermeister, Karl E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c482t-91d456e69cc78783a732648f98166475812782d5bf8fc2daf8aa233ea81189cd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1988</creationdate><topic>Aortic Valve - pathology</topic><topic>Aortic Valve - physiopathology</topic><topic>Aortic Valve Stenosis - pathology</topic><topic>Biological and medical sciences</topic><topic>Cardiac Catheterization</topic><topic>Cardiac Output</topic><topic>Cardiology. Vascular system</topic><topic>Endocardial and cardiac valvular diseases</topic><topic>Heart</topic><topic>Heart Valve Prosthesis</topic><topic>Humans</topic><topic>Medical sciences</topic><topic>Videotape Recording</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cannon, Scott R.</creatorcontrib><creatorcontrib>Richards, Kent L.</creatorcontrib><creatorcontrib>Crawford, Michael H.</creatorcontrib><creatorcontrib>Folland, Edward D.</creatorcontrib><creatorcontrib>Pierpont, Gordon</creatorcontrib><creatorcontrib>Sethi, Gulshan K.</creatorcontrib><creatorcontrib>Hammermeister, Karl E.</creatorcontrib><creatorcontrib>Participants in the Veterans Administration Cooperative Study on Valvular Heart Disease</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>The American journal of cardiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cannon, Scott R.</au><au>Richards, Kent L.</au><au>Crawford, Michael H.</au><au>Folland, Edward D.</au><au>Pierpont, Gordon</au><au>Sethi, Gulshan K.</au><au>Hammermeister, Karl E.</au><aucorp>Participants in the Veterans Administration Cooperative Study on Valvular Heart Disease</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Inadequacy of the gorlin formula for predicting prosthetic valve area</atitle><jtitle>The American journal of cardiology</jtitle><addtitle>Am J Cardiol</addtitle><date>1988-07-01</date><risdate>1988</risdate><volume>62</volume><issue>1</issue><spage>113</spage><epage>116</epage><pages>113-116</pages><issn>0002-9149</issn><eissn>1879-1913</eissn><coden>AJCDAG</coden><abstract>A total of 135 patients with normally functioning prosthetic aortic valves who were catheterized 6 months after placement of Hancock, modified Hancock or Bjork-Shiley prostheses were studied to determine the magnitude of error in Gorlin formula estimates of prosthetic aortic valve area. All patients were male, selected from 13 participating hospitals and routinely followed after valve replacement for 5 years. Hemodynamically determined Gorlin valve areas were compared with independently verified actual valve areas. Actual Hancock areas were measured from videotapes of valves exercised in a pulse duplicator flow model. Actual Bjork-Shiley areas were calculated directly from the valves' inner ring radius. Gorlin valve areas correlated poorly with actual valve areas (r = 0.39). The mean Gorlin formula error was 0.36 cm2 (standard deviation = 0.32). Gorlin areas overestimated actual areas by >0.25 cm2 in 43 patients (32%) and underestimated actual areas by >0.25 cm2 in 29 (21%). It was concluded that the Gorlin formula inaccurately predicts prosthetic valve area in the aortic position. Overreliance on this formula in assessing aortic stenosis could lead to errant clinical decisions.</abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><pmid>3381730</pmid><doi>10.1016/0002-9149(88)91374-4</doi><tpages>4</tpages></addata></record> |
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| subjects | Aortic Valve - pathology Aortic Valve - physiopathology Aortic Valve Stenosis - pathology Biological and medical sciences Cardiac Catheterization Cardiac Output Cardiology. Vascular system Endocardial and cardiac valvular diseases Heart Heart Valve Prosthesis Humans Medical sciences Videotape Recording |
| title | Inadequacy of the gorlin formula for predicting prosthetic valve area |
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