（是经起于极泉穴，终于少冲穴。）
心手少阴之脉，起于心中，出属心系，下膈络小肠。其支者，从心系上挟咽，系目系。其直者，复从心
系却上肺，下出腋下，循 内后廉，行手太阴心主之后，下肘内，循臂内后廉，抵掌后锐骨之端，入掌内后廉
，循小指之内，出其端。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。
心系有二，其一上通于肺；其一由肺叶而下，曲折向后，并脊里细络相连，与肾相通，正当七节之间，盖
心通五脏系也。手腕下胛为锐骨。
手少阴经受足太阴脾之交，起于心，循任脉之外，属心系，下膈，当脐上二寸之分，络小肠。其支者，从
心系出任脉之外，上行而挟咽，系目系。以上二脉，一下行，一上行，皆伏行于内者也。其直者，出行于外，
亦经脉也。从心系上至肺脏之分，出循腋下，抵极泉穴，自极泉下循 内后廉，行手太阴心主两经之后，历青
灵穴，下肘内廉，抵少海，自少海而下，循臂内后廉，历灵道、通里，至掌后锐骨之端，经阴 、神门，入掌
内廉，至少府，循小指端之少冲而终，以交于手太阳小肠。盖心为君主之官，尊于他脏，故其交经授受，不假
支别云。
手少阴心经，起始于心脏内部，向外归属于心系（连接心脏与其他脏器的组织），向下穿过膈肌，联络小肠。它的分支，从心系向上挟持咽喉，联系目系（眼球连系脑部的脉络）。它的直行主干，又从心系向上返回至肺部，向下出于腋下，沿上臂内侧后缘下行，走在手太阴肺经和手厥阴心包经的后面，下行至肘内，沿前臂内侧后缘下行，到达手掌后尺侧高骨（豌豆骨）的末端，进入手掌内侧后缘，沿小指内侧前行，出于其末端。
当本经发生异常变动时，会出现咽喉干燥、心痛、口渴想饮水的症状，这称为“臂厥”。本经主治心脏所发生的病变，包括目黄、胁痛、手臂内侧后缘疼痛或厥冷、掌心发热疼痛。对于上述各种病症，实证用泻法，虚证用补法，热证用疾刺法（快速进针出针），寒证用留针法，脉气下陷的用灸法，不虚不实的则取本经穴位治疗。实证表现为寸口脉搏动比人迎脉搏动大二倍；虚证表现为寸口脉搏动反而小于人迎脉搏动。
心系有两个部分，其中一个向上通于肺；另一个由肺叶下方开始，曲折向后，与脊柱内部的细络相连，与肾相通，正好位于第七节椎骨之间，这是因为心通过五脏之系相通。手腕下方的尖骨即为锐骨。
手少阴心经与足太阴脾经相交接，起始于心，沿任脉外侧走行，归属于心系，向下穿过膈肌，在脐上两寸的部位，联络小肠。它的分支，从心系出来，行于任脉之外，向上行走并挟持咽喉，联系目系。以上这两条脉，一条下行，一条上行，都是伏行于体内的。它的直行主干，行于体外，也是经脉的一部分。从心系向上至肺脏部位，外出沿腋下走行，到达极泉穴，自极泉穴向下沿上臂内侧后缘走行，走在手太阴肺经和手厥阴心包经两条经的后面，经过青灵穴，下行至肘内廉，到达少海穴，自少海穴向下，沿前臂内侧后缘走行，经过灵道穴、通里穴，到达手掌后锐骨的末端，经过阴郄穴、神门穴，进入手掌内侧，到达少府穴，沿小指末端至少冲穴而终结，从而与手太阳小肠经相交接。因为心是君主之官，地位尊贵高于其他脏腑，所以它的经络交接传授，不需要借助旁支别络来传达。
(This meridian originates at the Jiquan [HT1] acupoint and terminates at the Shaochong [HT9] acupoint.)
The Hand-Shaoyin Heart Meridian originates within the heart, emerges to connect with the Xinxi (tissues connecting the heart to other organs), descends through the diaphragm, and links with the Small Intestine. Its branch arises from the Xinxi, ascends along both sides of the pharynx, and connects with the Muxi (the system linking the eyeball to the brain). The main trunk, however, returns from the Xinxi to ascend into the lung, then descends to emerge from the axilla, follows the posterior medial aspect of the upper arm, runs posterior to the Hand-Taiyin Lung Meridian and the Hand-Jueyin Pericardium Meridian, descends into the elbow, follows the posterior medial aspect of the forearm, reaches the end of the ulnar styloid process (referred to as the "sharp bone" in the text), enters the posterior medial aspect of the palm, follows the medial side of the little finger, and exits at its tip.
When this meridian is disturbed, symptoms include dryness of the throat, heart pain, thirst with a desire to drink, which is termed "Bi Jue" (Arm Jue). This meridian governs diseases originating from the heart, including yellowing of the eyes, hypochondriac pain, pain or cold sensation in the posterior medial aspect of the arm, and heat and pain in the center of the palm. For these various conditions: excess patterns are treated by reducing; deficiency patterns are treated by tonifying; heat patterns are treated with rapid needle manipulation (quick insertion and withdrawal); cold patterns are treated by retaining the needle; sinking qi is treated with moxibustion; and patterns that are neither excess nor deficiency are treated by selecting points on the affected meridian itself. In excess patterns, the pulse at the Cunkou (radial artery) is twice as large as that at the Yingying (carotid artery); in deficiency patterns, the pulse at the Cunkou is smaller than that at the Yingying.
There are two parts of the Xinxi: one connects upward to the lung; the other extends downward from the lower lobe of the lung, curves backward, and connects via fine collaterals within the spine to the kidney, located precisely between the seventh vertebrae. This reflects how the heart connects with the systems of the five zang organs. The sharp bone refers to the styloid process below the wrist.
The Hand-Shaoyin meridian intersects with the Foot-Taiyin Spleen Meridian. It originates in the heart, runs outside the Renmai (Conception Vessel), connects with the Xinxi, descends through the diaphragm, and at the level of two cun above the umbilicus, links with the Small Intestine. Its branch emerges from the Xinxi, travels outside the Renmai, ascends to flank the pharynx, and connects with the Muxi. Of these two pathways, one descends and one ascends, both running internally within the body. The main trunk runs externally and constitutes the primary meridian pathway. From the Xinxi, it ascends to the region of the lung, emerges laterally along the axilla, reaches the Jiquan [HT1] acupoint, and from there descends along the posterior medial aspect of the upper arm, running posterior to the Hand-Taiyin Lung and Hand-Jueyin Pericardium meridians. It passes through the Qingling [HT12] acupoint, descends to the medial aspect of the elbow, reaches the Shaohai [HT3] acupoint, and from Shaohai continues down the posterior medial aspect of the forearm, passing through the Lingdao [HT4] and Tongli [HT5] acupoints, until it reaches the end of the ulnar styloid process. It then passes through the Yinxi [HT6] and Shenmen [HT7] acupoints, enters the medial aspect of the palm, reaches the Shaofu [HT8] acupoint, follows the tip of the little finger to terminate at the Shaochong [HT9] acupoint, thereby intersecting with the Hand-Taiyang Small Intestine Meridian. Because the heart is the sovereign official and holds a position of honor superior to other zang organs, its meridian connections and transmissions do not require auxiliary collateral branches for communication.