Miniti Vhoriyamu ropa zvinoti: nzira. cardiac indekisi

Miniti Vhoriyamu ropa, nzira yemaitiro kuti nokuenzanisa nhamba, uyewo dzimwe pfungwa inokosha inofanira hazvo kuva penhumbi wokuziva mudzidzi mishonga ipi, uye vanhu vakawanda vari kare kuita zvokurapa mabasa. Chii mufananidzo uyu sezvo zvinokanganisawo utano hwevanhu, nei zvichikosha kuti vanachiremba, uye kuti inoenderana nayo - mhinduro dzemibvunzo iyi vari kutsvaga jaya kana mukadzi achida kunyoresa muchikoro zvokurapa. Ndivo mibvunzo nezvayo munyaya ino.

mwoyo basa

Kuuraya huru kushanda mwoyo - hurukuro kune mapazi uye munyama vamwe Vhoriyamu ropa paminiti chikwata nguva (uwandu ropa paminiti) nokuda mamiriro mwoyo uye kushanda ezvinhu ari kweropa ino. Izvi basa rinokosha moyo kudzidzwa mumazuva chikoro. Vazhinji mabhuku yakaitwa, zvinosuwisa, zvishoma hurukuro pamusoro ichi chinokosha. Cardiac Output - rinobva sitiroko vhoriyamu uye kwemwoyo.

MO (SV) = HR X SV

cardiac indekisi

Kurohwa vhoriyamu - nechiidzo iyo anosarudza pakukura uye uwandu ropa vabudiswa paminiti ventricles rutapudzo, ayo nokukura ndizvo anenge kuenzana 70 Rine mamiririta. Cardiac indekisi - chisarudzo vhoriyamu 60-wechipiri, mudzoke neshoko pose nzvimbo dzomuviri womunhu. Panguva yokuzorora, zvakajairika kukosha kwayo vanenge 3 l / Maminitsi / m ^2.

In kwevanhu ropa miniti vhoriyamu romuzvarirwo zvinoenderana saizi muviri. Somuenzaniso, mashoko cardiac goho munhu yairema 53 makirogiramu hadzi, Hapana mubvunzo kuti dzinokwanisa kudzika kupfuura akasimba pabonde yairema 93 makirogiramu.

Kazhinji, munhu yairema 72 makirogiramu mwoyo miniti vhoriyamu kuitwa pumped paminiti ndiyo 5 l / min., Under mutoro mufananidzo uyu vanogona kukura 25 l / min.

Hunovhiringidza bhuku cardiac goho?

Iwo zviratidzo shoma:

• systolic Vhoriyamu ropa inoyerera zvakarurama atrium uye ventricle ( "mwoyo yakarurama"), uye kumanikidza kunotangira nayo - preload.
• ari kurwisa kunoita mwoyo tsandanyama nenguva kwebhuku inotevera Vhoriyamu ropa kubva ventricle kuruboshwe - afterload.
• nguva uye kwemwoyo uye myocardial contractility, izvo kushandura pasi pokudzora kwomudzimu vasanonoka uye parasympathetic tsinga.

Contractility - pomwoyo kukwanisa vaunze simba chero kureba tsandanyama faibha. The raora hwounhu izvi zvose, chokwadi, kunokanganisa paminiti ropa vhoriyamu, kumhanya uye mutinhimira, uyewo mamwe cardiac parameters.

Sezvo izvi inodzorwa muna myocardium?

mwoyo tsandanyama marwadzo kunoitika kana karusiyamu wevasungwa mukati sero anova mmol anopfuura 100, usingashandi kukosha susceptibility contractile midziyo kuti karusiyamu.

In achizorora masero kuratidzwa karusiyamu ions kuti nzira yavo cardiomyocyte kubudikidza L-Mipata yose Kamudzira, uyewo dzinounzwa mukati sero kupinda cytoplasm wayo kubva sarcoplasmic retikkuluma. Nokuda hunyambiri ayo wevasungwa inowedzera nokukurumidza gwara pakutengeserana micronutrient, uye ichi ndicho kutanga rutapudzo ose cardiac myocytes. Izvi Dual nzira "kuvesa" ndiwo maitiro chete nokuda mwoyo. Kana pasina extracellular karusiyamu mutsika, mwoyo tsandanyama haazovanzwiri.

Norepinephrine kemikari, iyo asunungurwa tsitsi tsinga harinzwi anovandudza nokukurumidza mwero uye contractility kwomwoyo, nokudaro vachiwedzera cardiac goho. fuma iyi runobva kuna vasiri inotropic nevamiririri. Digoxin - zvinodhaka inotropic chinodhaka, rinoshandiswa mune zvimwe zviitiko kuti kurapwa komoyo kukundikana.

Kurohwa vhoriyamu uye akazadza kuvafurira

Miniti Vhoriyamu ropa ventricle kuruboshwe, iyo yakaumbwa pakupedzisira diastole uye systole hwaro kunoenderana tsandanyama rinenge elasticity uye magumo-diastolic kumanikidzwa. BP zvakarurama mwoyo nokuda kwokudzvinyirira kwomunhu venous hurongwa.

Kana kuwedzera mugumo-diastolic kumanikidzwa, kuwedzera simba inotevera mwero uye nesitiroko vhoriyamu. Kuti isimba rutapudzo riri chokuita mwero tsandanyama makakatanwa.

Kukanganiswa systolic Vhoriyamu ropa kubva ventricles inonzi zvakaenzana. Kana akabuda kubva kurudyi ventricle kuchaita pfuura choutsi kubva kuruboshwe kwenguva yakati, vanogona kuva pulmonary edema. Zvisinei, pane vanodzivirira zvenhengo umo dzepanguva zviito, nokuda yakawedzera Munotatamura pamusoro tsandanyama fibers vari ventricle rworuboshwe anowedzera uwandu ropa vabudiswa pairi. Izvi kuwedzera cardiac goho kudzivirira kufurirwa akavaka-kukwira pulmonary riparadzirwe pavezve mwero.

By chete mashandiro ari kuwedzera ejection cheBhuku ropa panguva yechiitwa.

mashandiro ichi - yakawedzera cardiac marwadzo kana ruoko tsandanyama fibers - kunzi mutemo Frank-Starling. Chinhu chinokosha compensatory mashandiro mumwoyo kukundikana.

chiito afterload

Kana kuwedzera BP kana kuwedzera bhuku vabudiswa ropa afterload dzinogona kukura. pfuma iyi rave rakanyorwawo uye akasimbisa experimentally makore mazhinji akapfuura, iyo akabvumira kurishandura kuti Masvomhu uye Masvomhu.

Kana ropa kubva ventricle kuruboshwe riri vabudiswa mukuru nemishonga, ipapo pane imwe nguva residual Vhoriyamu ropa iri kuruboshwe ventricle uchawedzera vakawedzera extensibility myofibrils, izvozvo anowedzera nevanga vhoriyamu uye somugumisiro - yakawedzera cardiac goho ropa mutemo maererano Frank-Starling. Mushure zvinogara anoverengeka, uwandu ropa achidzokera chepakutanga.
The autonomic tsinga - zvokunze regulator pamusoro cardiac goho.

Ventricular achizadza kumanikidzwa, kuchinja mwoyo yevanhu uye contractility anogona kushandura nesitiroko vhoriyamu. Central venous kumanikidzwa uye autonomic tsinga ndiwo zvinhu zvinodzora cardiac goho.

Saka, zvatakurukura pfungwa uye tsanangudzo vanotaurwa Okutanga ino. Tinovimba mashoko pamusoro achava kubatsira munhu kuziva nyaya vataura vanhu.