经云∶心者，君主之官，神明出焉。又云∶心居肺管之下，膈膜之上，附着脊之第
五椎。其合脉也，其荣色也。开窍于耳，又曰开窍于舌。又云∶是经少血多气。
《难经》曰∶心重十二两，中有七孔三毛，盛精汁三合，主藏神。
张介宾曰∶心象尖圆，形如莲蕊。其中有窍，多寡不同，以导引天真之气。下无透
窍，上通乎舌，共有四系，以通四脏。心外有赤黄脂裹，是为心包络。心下有膈膜，与
脊胁周回相着，遮蔽浊气，使不得上熏心肺，所谓膻中也。
\r手少阴心脏图\p06-d43a59.bmp\r
心手少阴之脉，起于心中，出属心系，下膈络小肠。其支者，从心系上侠咽，系目系。
其直者，复从心系却上肺，下出腋下，循 内后廉，行手太阴肺心主之后，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。
\r心经循行图\p06-d43a60.bmp\r
手少阴脉起心中，下膈直与小肠通。支者还从肺系走，直上喉咙系目瞳。直者上肺
出腋下， 后肘内少海从，臂内后廉抵掌中，锐骨之端注少冲。
【注】手少阴心经之脉，起于心中，出属心系，由心系下膈，络小肠。其经之支者，从
心系上行侠咽，系目之系。其经之直者，复从心系退上通肺，行手太阴肺心主之后，下
出行腋下，极泉穴也。从极泉穴循 内后廉，青灵穴也。从青灵穴下肘内循臂内后廉，少
海穴也。从少海穴抵掌后锐骨之端，灵道、通
里、阴 、神门等穴也。从神门穴入掌内后廉，少府穴也。从少府穴循小指之内，出其
端，少冲穴而终，以交于手太阳小肠经也。
古籍记载：心，是君主之官，神明由此产生。又说：心位于肺管之下，膈膜之上，附着于脊柱的第五椎骨处。心与脉相合，其华表现在面色上。开窍于耳，又有人说开窍于舌。还说：这条经脉（手少阴心经）血少气多。
《难经》说：心脏重十二两，中间有七个孔和三条毛脉，盛装精汁三合，主要功能是藏神。
张介宾说：心脏形状尖圆，外形像莲花的蕊。其中间有孔窍，多少不同，用来引导天真的元气。下方没有透出的孔窍，上方连通舌头，共有四条系带，用来连通其他四个脏器。心脏外面有赤黄色的脂肪包裹，这就是心包络。心脏下面有膈膜，与脊柱、胁部周围相连着，遮蔽浊气，使浊气不能向上熏蒸心肺，这就是所谓的膻中。
手少阴心经的经脉，起始于心中，出来归属于心系，向下穿过膈肌，联络小肠。它的分支，从心系向上夹着咽喉，联系目系（眼球连系脑部的脉络）。它的直行者，又从心系退回向上进入肺，向下出于腋下，沿着上臂内侧后缘，走在手太阴肺经和手厥阴心包经的后面，下行至肘内，沿着前臂内侧后缘，到达手掌后方尺侧高骨（豌豆骨）的末端，进入手掌内侧后缘，沿着小指内侧，从小指末端出。
手少阴脉起于心中，向下穿过膈肌直接与小肠相通。分支还从肺系走出，直上喉咙联系瞳孔。直行者上入肺，出于腋下，经过肘内少海穴，沿前臂内侧后缘到达掌中，在锐骨末端注入少冲穴。
【注释】手少阴心经的经脉，起始于心中，出来归属于心系，由心系向下穿过膈肌，联络小肠。该经的分支，从心系上行夹着咽喉，联系目系的脉络。该经的直行者，又从心系退回向上连通肺，走在手太阴肺经和手厥阴心包经的后面，下行出于腋下，即极泉穴。从极泉穴沿着上臂内侧后缘，即青灵穴。从青灵穴下行至肘内，沿着前臂内侧后缘，即少海穴。从少海穴到达手掌后方锐骨的末端，即灵道、通里、阴郄、神门等穴。从神门穴进入手掌内侧后缘，即少府穴。从少府穴沿着小指内侧，出其末端，即少冲穴而终止，以此交接于手太阳小肠经。
The classic states: The Heart is the official of the sovereign, from which Shen (Spirit/Mind) emerges. It is also stated: The Heart resides below the pulmonary tube and above the diaphragm, attached to the fifth thoracic vertebra of the spine. Its connection is with the vessels, and its luster manifests in the complexion. It opens into the ears, and it is also said to open into the tongue. Furthermore, it is stated that this meridian (Hand-Shaoyin Heart Meridian) has little blood but abundant Qi.
The *Nan Jing* (Classic of Difficult Issues) states: The Heart weighs twelve taels, contains seven orifices and three hairs, holds three he of essence fluid, and primarily functions to store Shen (Spirit).
Zhang Jiebin states: The Heart is pointed and round in shape, resembling the pistil of a lotus. Within it are orifices of varying numbers, which guide the primordial Qi. There are no perforating orifices at the bottom, while the top connects to the tongue. There are four ties in total, which connect to the other four Zang organs. Outside the Heart, there is red-yellow fat wrapping it, known as the Pericardium (Xin Bao Luo). Below the Heart is the diaphragm, which attaches circumferentially to the spine and ribs, shielding turbid Qi so that it cannot ascend to smoke the Heart and Lungs; this is what is referred to as Dan Zhong (Chest Center).
The Hand-Shaoyin Heart Meridian originates in the Heart, emerges to belong to the Heart system (Xin Xi), descends through the diaphragm, and connects with the Small Intestine. Its branch ascends from the Heart system, flanking the pharynx, and connects to the Eye System (Mu Xi). Its straight branch returns from the Heart system, ascends into the Lung, emerges downward from the axilla, follows the posterior medial border of the upper arm, runs posterior to the Hand-Taiyin Lung Meridian and Hand-Jueyin Pericardium Meridian, descends into the elbow, follows the posterior medial border of the forearm, reaches the end of the styloid process of the ulna (posterior radial bone tip), enters the posterior medial aspect of the palm, follows the medial side of the little finger, and exits at its tip.
The Hand-Shaoyin meridian originates in the Heart, descends through the diaphragm, and directly connects with the Small Intestine. The branch returns from the Lung system, travels upward to the throat, and connects to the pupil. The straight branch ascends into the Lung, emerges from the axilla, passes through Shaohai (HT3) in the elbow, follows the posterior medial border of the forearm to the center of the palm, and injects into Shaochong (HT9) at the end of the styloid process.
[Note] The meridian of the Hand-Shaoyin Heart Meridian originates in the Heart, emerges to belong to the Heart system, descends from the Heart system through the diaphragm, and connects with the Small Intestine. The branch of this meridian ascends from the Heart system, flanking the pharynx, and connects to the Eye System. The straight branch of this meridian returns from the Heart system, ascends to connect with the Lung, runs posterior to the Hand-Taiyin Lung Meridian and Hand-Jueyin Pericardium Meridian, descends to emerge from the axilla, which is Jiquan (HT1). From Jiquan (HT1), following the posterior medial border of the upper arm, is Qingling (HT12). From Qingling (HT12), descending into the elbow and following the posterior medial border of the forearm, is Shaohai (HT3). From Shaohai (HT3), reaching the end of the styloid process of the ulna, are Lingdao (HT4), Tongli (HT5), Yinxi (HT6), Shenmen (HT7), and other acupoints. From Shenmen (HT7), entering the posterior medial aspect of the palm, is Shaofu (HT8). From Shaofu (HT8), following the medial side of the little finger and exiting at its tip, is Shaochong (HT9), where it terminates and connects with the Hand-Taiyang Small Intestine Meridian.