手少阴心之经腹走胸而胸走手是经多血少气起于极泉止于少冲计九穴左右共一十八穴心形如
未敷莲花居肺下膈上附着于脊之第五椎
手少阴心五脏通下膈络绕小肠中
灵枢第十篇云手少阴之脉起于心中出属心系下膈络小肠○滑氏曰心系有二一则上与肺相通而
入肺两大叶间一则由肺叶而下曲折向后并脊膂细络相连贯脊髓与肾相通正当七节之间盖五脏
系皆通于心而心通五脏系也手少阴经起于心循任脉之外属心系下膈当脐上二寸之分络小肠
别从心系横支起上夹喉门目系同
灵枢第十篇云其支者从心系上挟咽系目系○滑氏曰支者从心系出任脉之外上行而挟咽系目也
其支复从心系出上循肺上横循腋极泉穴在臂内厢腋下筋间当动脉
灵枢第十篇云其直者复从心系却上肺出腋下○滑氏曰直者复从心系直上至肺脏之分出循腋下
极泉 在臂内腋下筋间动脉入胸
下循 外后廉行太阴心主后青灵下肘内廉来少海
灵枢第十篇云下循 内后廉行太阴心主之后下肘内廉○滑氏曰自极泉下循 内后廉行太阴心
主两经之后历青灵穴下肘内廉抵少海
青灵 在肘上三寸举臂取之
少海 在肘内大骨外去肘端五分
臂廉灵道甚分明通理排来阴 底掌后神门循小指少府前行出少冲交手太阳小肠是
灵枢第十篇云循臂内后廉抵掌后兑骨之端入掌内后廉循小指之内出其端○滑氏曰腕下踝为兑
骨自少海而下循臂内后廉历灵道通理至掌后兑骨之端经阴 神门入掌内廉至少府循小指端之
少冲而终以交于手太阳也
灵道 在掌后一寸五分
通理 在腕后一寸陷中
阴 在掌后脉中去腕五分
神门 在掌后兑骨之端陷者中
少府 在手小指本节后陷中直劳宫
少冲 在手小指内廉端去爪甲如韭叶
总歌曰
心脉元来起膈中更还心系始通胸络肠出腋方循肘入掌分明见少冲
愚按手少阴心之脉起于心中终于小指内廉出其端长三尺五寸而直交于手太阳小肠经盖心为君
主之官示尊于他藏故其交经授受不假别支而直自本经少冲穴交于手太阳小肠经故手大阳之脉
起于小指外侧端少泽穴始也
穴歌曰
九穴心经手少阴极泉青灵少海深灵道通理阴 遂神门少府少冲寻
是动所生歌曰
多气少血属此经是动心脾痛难任渴欲饮水咽干燥所生胁痛目如金胁臂之内后廉痛掌中有热向
灵枢第十篇云是动则病嗌干心痛渴而欲饮是为臂厥是主心所生病者目黄胁痛 臂内后廉痛厥
掌中热痛为此诸病盛则泻之虚则补之热则疾之寒则留之陷下则灸之不盛不虚以经取之盛者寸
口大再倍于人迎虚者寸口反小于人迎也
手少阴心经，从腹部走向胸部，再从胸部走向手部。这条经脉多血少气，起始于极泉穴，终止于少冲穴，共计九个穴位，左右两侧共十八个穴位。心脏的形状像未开放的莲花，位于肺脏下方、横膈膜上方，附着在脊柱的第五椎骨处。
《灵枢》第十篇记载：“手少阴心经的脉气，起始于心中，出来归属于心系（连接心脏的组织），向下穿过横膈膜，联络小肠。”滑寿氏解释说：心系有两个部分，一部分向上与肺相通，进入两肺叶之间；另一部分由肺叶向下，曲折向后，通过细小的络脉与脊柱相连，贯通脊髓并与肾脏相通，正好位于第七节椎骨之间。大概五脏的系带都通达于心，而心也通达五脏的系带。手少阴心经起始于心，沿着任脉的外侧，归属于心系，向下穿过横膈膜，到达肚脐上两寸的部位，联络小肠。
另一支脉从心系横向发出，向上夹着喉咙，联系到目系（眼球连系脑部的脉络）。
《灵枢》第十篇记载：“其支脉，从心系向上，夹着咽喉，联系目系。”滑寿氏解释说：支脉从心系出发，走在任脉的外侧，向上行走并夹着咽喉，联系目系。
又一支脉从心系发出，向上沿着肺脏，横向经过腋下的极泉穴。极泉穴位于手臂内侧，腋下筋脉之间，正对动脉搏动处。
《灵枢》第十篇记载：“其直行者，再次从心系返回上行至肺脏，出于腋下。”滑寿氏解释说：直行者再次从心系直接上行至肺脏部位，沿着腋下走出。
接着向下沿着臂内后侧边缘行走，行在手太阴肺经和手厥阴心包经之后，经过青灵穴，下行至肘部内侧边缘，到达少海穴。
《灵枢》第十篇记载：“向下沿着臂内后侧边缘行走，行在手太阴肺经和手厥阴心包经之后，下行至肘部内侧边缘。”滑寿氏解释说：从极泉穴向下，沿着臂内后侧边缘行走，行在手太阴肺经和手厥阴心包经这两条经之后，经过青灵穴，下行至肘部内侧边缘，抵达少海穴。
青灵穴位于肘尖上三寸处，举臂时可取到。
少海穴位于肘部内侧大骨外侧，距离肘端五分处。
沿着手臂内侧边缘，灵道穴和通理穴位置分明。继续向下推按至阴郄穴，再至神门穴，沿小指方向至少府穴前行，最终出于少冲穴，交接给手太阳小肠经。
《灵枢》第十篇记载：“沿着手臂内侧后侧边缘，抵达手掌后方豆骨（豌豆骨）的末端，进入掌内后侧边缘，沿着小指内侧，出其末端。”滑寿氏解释说：腕下踝部称为兑骨（即豌豆骨）。自少海穴向下，沿着手臂内侧后侧边缘，经过灵道穴、通里穴，到达掌后兑骨的末端，经过阴郄穴、神门穴，进入掌内边缘，至少府穴，沿着小指末端至少冲穴结束，从而交于手太阳经。
灵道穴位于掌后一寸五分处。
通里穴位于腕后一寸处的凹陷中。
阴郄穴位于掌后脉搏跳动处，距离腕部五分。
神门穴位于掌后兑骨末端的凹陷中。
少府穴位于手小指本节（掌指关节）后的凹陷中，直对劳宫穴。
少冲穴位于手小指内侧尖端，距离指甲角如韭菜叶宽度处。
总歌曰：
心脉原本起始于膈中，又回归心系始通达胸廓，联络肠道，出于腋下，方才沿着肘部，进入手掌，分明可见少冲穴。
我按语：手少阴心经的脉气起始于心中，终止于小指内侧尖端，长度三尺五寸，直接交于手太阳小肠经。因为心是君主之官，显示尊贵高于其他脏腑，所以其经络交接授受不需要借助别的分支，而是直接从本经的少冲穴交于手太阳小肠经。因此，手太阳小肠经的脉气起始于小指外侧端点的少泽穴。
穴位歌曰：
九穴心经手少阴，极泉、青灵、少海深，灵道、通里、阴郄，遂及神门、少府、少冲寻。
是动所生病歌曰：
此经多气少血。若是“是动”病，则心痛、脾痛难以忍受，口渴想喝水，咽喉干燥。“所生”病，则是胁痛，眼睛发黄如金色，胁肋和手臂内侧后侧疼痛，手掌中有热感。
《灵枢》第十篇记载：“是动则病，咽喉干燥，心痛，口渴想饮水，这称为臂厥。本经主治心所生的疾病：眼睛发黄，胁痛，手臂内侧后侧疼痛，掌心发热疼痛。”对于这些病症，实证用泻法，虚证用补法，热证用疾刺法，寒证用留针法，脉气下陷的用灸法，不虚不实的情况以本经取穴治疗。实证时，寸口脉比人迎脉大二倍；虚证时，寸口脉反而小于人迎脉。
Figure of the Hand-Shaoyin Heart Meridian
The Hand-Shaoyin Heart Meridian runs from the abdomen to the chest, and then from the chest to the hand. This meridian is characterized by abundant blood and scarce Qi. It originates at Jiquan (HT1) and terminates at Shaochong (HT9), comprising nine acupoints on each side, totaling eighteen acupoints bilaterally. The heart resembles an unopened lotus flower; it is located below the lungs and above the diaphragm, attached to the fifth thoracic vertebra of the spine.
As one of the Zang organs, the Heart connects downward through the diaphragm and links with and surrounds the Small Intestine.
Chapter 10 of *Ling Shu* states: "The pulse of the Hand-Shaoyin [Heart] originates in the heart, emerges to belong to the Xinxi (heart system/connective tissue), descends through the diaphragm, and links with the small intestine." Mr. Hua (Shou) explained: There are two parts of the Xinxi. One part connects upward with the lungs, entering between the two lobes of the lungs. The other part descends from the lung lobes, curves backward, and connects via fine collaterals to the spine, penetrating the spinal cord and communicating with the kidneys, situated precisely between the seventh vertebral segments. Generally, the systems of all five Zang organs connect to the heart, and the heart connects to the systems of the five Zang organs. The Hand-Shaoyin Heart Meridian originates in the heart, runs along the lateral aspect of the Ren Mai (Conception Vessel), belongs to the Xinxi, descends through the diaphragm, reaches the area two cun above the umbilicus, and links with the small intestine.
Another branch arises horizontally from the Xinxi, ascends alongside the throat, and connects to the Muxi (eye system).
Chapter 10 of *Ling Shu* states: "Its branch rises from the Xinxi, ascends alongside the pharynx, and connects to the eye system." Mr. Hua explained: The branch emerges from the Xinxi, travels laterally to the Ren Mai, ascends, and runs alongside the pharynx to connect to the eye system.
Another branch emerges from the Xinxi, ascends along the lungs, and crosses horizontally to the Jiquan (HT1) acupoint in the axilla. Jiquan is located in the inner arm, within the tendons under the axilla, directly opposite the arterial pulsation.
Chapter 10 of *Ling Shu* states: "Its straight line returns from the Xinxi, ascends to the lungs, and emerges from the axilla." Mr. Hua explained: The straight line returns directly from the Xinxi to the level of the lung organ, emerges along the axilla.
It then descends along the posterior medial border of the arm, running posterior to the Hand-Taiyin Lung Meridian and the Hand-Jueyin Pericardium Meridian, passing through Qingling (HT8), descending to the medial border of the elbow, and arriving at Shaohai (HT3).
Chapter 10 of *Ling Shu* states: "Descending along the posterior medial border of the arm, running posterior to the Hand-Taiyin Lung Meridian and the Hand-Jueyin Pericardium Meridian, it descends to the medial border of the elbow." Mr. Hua explained: From Jiquan, it descends along the posterior medial border of the arm, running posterior to the Hand-Taiyin Lung Meridian and the Hand-Jueyin Pericardium Meridian, passes through Qingling (HT8), descends to the medial border of the elbow, and arrives at Shaohai (HT3).
Qingling (HT8) is located three cun above the elbow tip; it can be located with the arm raised.
Shaohai (HT3) is located lateral to the medial epicondyle of the humerus, five fen from the end of the elbow.
Along the medial border of the arm, Lingdao (HT4) and Tongli (HT5) are clearly positioned. Continuing downward to Yinxi (HT6), then Shenmen (HT7), proceeding along the little finger to Shaofu (HT8), finally emerging at Shaochong (HT9), where it intersects with the Hand-Taiyang Small Intestine Meridian.
Chapter 10 of *Ling Shu* states: "Following the posterior medial border of the arm, it reaches the end of the pisiform bone at the back of the palm, enters the posterior medial aspect of the palm, follows the medial side of the little finger, and emerges at its tip." Mr. Hua explained: The ankle-like prominence below the wrist is called the Dui Gu (pisiform bone). Descending from Shaohai (HT3), it follows the posterior medial border of the arm, passes through Lingdao (HT4) and Tongli (HT5), reaches the end of the pisiform bone at the back of the palm, passes through Yinxi (HT6) and Shenmen (HT7), enters the medial aspect of the palm to Shaofu (HT8), follows the tip of the little finger to Shaochong (HT9), and concludes by intersecting with the Hand-Taiyang Meridian.
Lingdao (HT4) is located one cun and five fen distal to the wrist crease.
Tongli (HT5) is located in the depression one cun proximal to the wrist crease.
Yinxi (HT6) is located on the radial artery at the wrist crease, five fen proximal to the wrist joint.
Shenmen (HT7) is located in the depression at the ulnar end of the pisiform bone.
Shaofu (HT8) is located in the depression proximal to the base of the fifth metacarpal bone, directly opposite Laogong (PC8).
Shaochong (HT9) is located at the radial corner of the nail bed of the little finger, approximately the width of a leek leaf from the nail margin.
General Song:
The Heart pulse originally originates from the diaphragm, returns to the Xinxi to communicate with the chest, links with the intestines, emerges from the axilla, follows the elbow, enters the palm, where Shaochong is clearly seen.
My Commentary: The pulse of the Hand-Shaoyin Heart Meridian originates in the heart and terminates at the medial tip of the little finger, measuring three chi and five cun in length, directly intersecting with the Hand-Taiyang Small Intestine Meridian. Because the Heart is the official of the sovereign, demonstrating superiority over other Zang organs, its meridian intersections do not require auxiliary branches but directly transfer from its own Shaochong (HT9) acupoint to the Hand-Taiyang Small Intestine Meridian. Therefore, the pulse of the Hand-Taiyang Small Intestine Meridian begins at Shaose (SI1) on the ulnar side of the tip of the little finger.
Acupoint Song:
Nine acupoints of the Hand-Shaoyin Heart Meridian: locate Jiquan, Qingling, deep Shaohai, Lingdao, Tongli, Yinxi, followed by Shenmen, Shaofu, and Shaochong.
Song of Disorders Caused by Movement and Diseases Generated:
This meridian has abundant Qi and scarce Blood. If it is a disorder caused by movement (Shidong), there is unbearable pain in the heart and spleen, thirst with desire to drink water, and dryness of the throat. For diseases generated (Suosheng), there is hypochondriac pain, eyes yellow like gold, pain in the hypochondrium and the posterior medial aspect of the arm, and heat in the palm.
Chapter 10 of *Ling Shu* states: "Disorders caused by movement include dryness of the pharynx, heart pain, thirst with desire to drink, known as Arm-Jue. Diseases governed by the Heart include yellow eyes, hypochondriac pain, pain in the posterior medial aspect of the arm, and heat/pain in the palm." For these conditions, excess is treated with draining methods, deficiency with tonifying methods, heat with rapid needling, cold with retained needle insertion, sinking Qi with moxibustion, and neither excess nor deficiency with points from the affected meridian itself. In excess cases, the Cun Kou pulse is twice as large as the Ren Ying pulse; in deficiency cases, the Cun Kou pulse is smaller than the Ren Ying pulse.