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心脏循环心脏血管介绍分析医学培训PPT

  • 2026-05-30 19:58:24
心脏循环心脏血管介绍分析医学培训PPT
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心脏循环心脏血管介绍分析医学培训
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一、心脏解剖构造

心脏位于胸腔纵隔内,处在第2-6肋软骨、第5-8胸椎之间,2/3偏身体正中线左侧,整体走向右后上至左前下。

心脏外形像倒置、前后略扁的圆锥体,概括为“一尖一底、三缘两面”,即心尖心底,左缘、右缘、下缘,胸肋面和膈面。

心脏分为四个腔室:右心房、右心室、左心房、左心室。右心房有上、下腔静脉口、冠状窦口、卵圆窝,Koch 三角是射频消融、房室结定位的重要解剖标志。右心室含三尖瓣、室间隔、肺动脉瓣,负责将静脉血泵入肺循环。左心房收纳四条肺静脉动脉血,左心室心肌最肥厚,借二尖瓣、主动脉瓣将血液泵往全身体循环。

心脏有四组瓣膜,“二尖瓣、三尖瓣、主动脉瓣、肺动脉瓣”,均起到单向阀门作用,防止血液倒流,各瓣膜均有固定体表听诊区,是听诊判病的重要依据。

二、心脏血管系统

冠状动脉因环绕心脏形似王冠而得名,发自主动脉根部三个瓣叶,如左冠开口于左冠瓣,右冠开口于右冠瓣,无冠瓣无血管开口。

冠脉主干分左冠状动脉、右冠状动脉。左冠状动脉起始为左主干,分出前降支、回旋支;右冠状动脉发出后降支,左右冠脉末端均延续为左室后支。

另有三组对称分支,分别为:

右冠锐缘支、回旋支钝缘支;动脉圆锥支;右室前支。前降支与回旋支夹角发出对角支,分级分布,供血左室前壁。

93%房室结由右冠状动脉分支供血,所以右冠心梗常并发房室传导阻滞、窦缓甚至窦停。

心肌桥指本该走行心外膜的冠脉,部分潜入心肌内,多见于前降支;人群发生率60%–80%,心脏收缩时挤压血管,可引发心肌缺血、心绞痛。

心脏静脉以冠状窦为核心,心大静脉、心中静脉汇入冠状窦回流右心房;心前静脉直接入右心房,不经过冠状窦。冠状窦在电生理电极置入、心脏手术逆灌注中具有重要临床价值。

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  139. /yingpanguazai/ssd/ssd1/www/h.sjds.net/runtime/temp/ad153693ed39fba6d1bda2fe72512cde.php ( 12.06 KB )
  140. /yingpanguazai/ssd/ssd1/www/h.sjds.net/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000410s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000568s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000275s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000283s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000481s ]
  6. SELECT * FROM `set` [ RunTime:0.000199s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000538s ]
  8. SELECT * FROM `article` WHERE `id` = 524078 LIMIT 1 [ RunTime:0.002453s ]
  9. UPDATE `article` SET `lasttime` = 1780303861 WHERE `id` = 524078 [ RunTime:0.009148s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000279s ]
  11. SELECT * FROM `article` WHERE `id` < 524078 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000501s ]
  12. SELECT * FROM `article` WHERE `id` > 524078 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003326s ]
  13. SELECT * FROM `article` WHERE `id` < 524078 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002548s ]
  14. SELECT * FROM `article` WHERE `id` < 524078 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.011699s ]
  15. SELECT * FROM `article` WHERE `id` < 524078 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.022788s ]
0.121265s