'),_.close()}}(),"".length>0)if(a&&"performance"in a&&a.performance&&"function"==typeof a.performance.setResourceTimingBufferSize)a.performance.setResourceTimingBufferSize();!function(){if(BOOMR=a.BOOMR||{},BOOMR.plugins=BOOMR.plugins||{},!BOOMR.plugins.AK){var e=""=="true"?1:0,t="",n="qskmnpaxgakveyk3pawq-f-34de2d4e2-clientnsv4-s.akamaihd.net",i="false"=="true"?2:1,_={"ak.v":"32","ak.cp":"1078609","ak.ai":parseInt("299204",10),"ak.ol":"0","ak.cr":16,"ak.ipv":4,"ak.proto":"http/1.0","ak.rid":"2a4a47f","ak.r":35789,"ak.a2":e,"ak.m":"a","ak.n":"essl","ak.bpcip":"132.148.198.0","ak.cport":60038,"ak.gh":"23.48.215.15","ak.quicv":"","ak.tlsv":"tls1.3","ak.0rtt":"","ak.csrc":"-","ak.acc":"reno","ak.t":"1633384493","ak.ak":"hOBiQwZUYzCg5VSAfCLimQ==wJTIfKEM+H1kdnn6G/j+tf938vh2UNGwrsjO9MH9UWNUa76B8S4DbQPqxwcmFR6CUn4T7A0N0u8wnNQaJ42Lom+9JVZmHhgGbpeFeiUg6ZvTdT/ZC+LqjQh6KmHdYNjPLJPwF1JmOwUbU3IbYG6MbjJfGZ3k5j/mFlWlUnj+IrhxVgAs5x2tAHkvwGKph0OjUZKBq4bCJlOGLiniZ5409tFvsujURj3IuWbUwOY4Ix82YcBKVF+D8NOjgFaS12Ji+WkswwO1Lwbm1sYmDiUm5b/PGvaw2TCdUQetWY8LCPav+JV0dI0RLC9LLtxlU3QuEdnNer6VmsnI0JTWkHqjQpKUp+UcWXWSErdRfkT4/8ntS7l/8iGFKv/qoe23J8RClwCHM8q/UQM32FSAsD1o+rll9I32BxxQhYPpK0Vcc0k=","ak.pv":"42","ak.dpoabenc":"","ak.tf":i};if(""!==t)_["ak.ruds"]=t;var o={i:!1,av:function(e){var t="http.initiator";if(e&&(!e[t]||"spa_hard"===e[t]))_["ak.feo"]=void 0!==a.aFeoApplied?1:0,BOOMR.addVar(_)},rv:function(){var a=["ak.bpcip","ak.cport","ak.cr","ak.csrc","ak.gh","ak.ipv","ak.m","ak.n","ak.ol","ak.proto","ak.quicv","ak.tlsv","ak.0rtt","ak.r","ak.acc","ak.t","ak.tf"];BOOMR.removeVar(a)}};BOOMR.plugins.AK={akVars:_,akDNSPreFetchDomain:n,init:function(){if(!o.i){var a=BOOMR.subscribe;a("before_beacon",o.av,null,null),a("onbeacon",o.rv,null,null),o.i=!0}return this},is_complete:function(){return!0}}}}()}(window); Gaps in evidence Summary Appendix References. ext = ['pdf', 'zip', 'doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx', 'pps','ppsx','mp3', 'txt', 'vsd', 'rar', 'wma', 'avi', 'mmv']; Found insideInternationally renowned authors Dr. Catherine M. Otto and Dr. Robert O. Bonow help you apply today's best, evidence-based medical and surgical approaches in your daily practice. } This means less blood is able to exit the heart. Biological valves are made mainly from pig, cow, or human heart tissue. This may lead to easier and faster recovery from surgery.