Ukuchacha kunye nokuvuselelwa emva kokuhlaselwa yintliziyo: Masithethe ngale nto!

Ukuba ukhe wahlaselwa yintliziyo, kuyinto eqhelekileyo ukuziva usoyika kakhulu kwaye ungaqinisekanga emva kokubuya ekhaya esibhedlele. Mhlawumbi unemibuzo emininzi engqondweni yakho, efana nokuthi "Ndiza kuphila njani ngoku?", "Ngaba ndiza kukwazi ukusebenza kwakhona ngendlela efanayo?" Oko kuqhelekile kakhulu. Ngoko ke, kweli nqaku, siza kuthetha ngendlela yokuchacha kancinci kancinci kule meko inzima, kunye nento ekufuneka siyenze ngayo.

Kuthatha ixesha elingakanani ukuchacha emva kokuhlaselwa yintliziyo?

Ngamafutshane, kunokuthatha naphi na ukusuka kwiiveki ezimbini ukuya kwiinyanga ezintathu ukuchacha ngokupheleleyo kwisifo sentliziyo. Wakuba uphilile ngokupheleleyo, ungabuyela emsebenzini wakho kwaye wenze imisebenzi yakho yemihla ngemihla njengesiqhelo.

Nangona kunjalo, eli xesha lokuphiliswa linokwahluka kumntu nomntu. Kukho izinto ezininzi ezinokulichaphazela:

• Ubunzima bokuhlaselwa yintliziyo yakho: Ezinye izifo zentliziyo zincinci kakhulu, ngelixa ezinye zinkulu kakhulu. Ixesha lokuchacha liya kwahluka ngokufanelekileyo.
• Indlela ofumana ngayo unyango ngokukhawuleza: Okukhona ufumana unyango ngokukhawuleza, kokukhona umonakalo omncinci entliziyweni kwaye kokukhona ixesha lokuchacha lifutshane.
• Unyango olufumeneyo: Umzekelo, ukuba wenze utyando lwentliziyo evulekileyo, kuya kuthatha ixesha elide ukuba uphile kunonyango lwentliziyo oluqhutywa nge-percutaneous (ngamanye amaxesha olubizwa ngokuba yi-stenting).
• Impilo yakho iyonke kunye nezinye iimeko zempilo: Ukuba unezinye iimeko zempilo, ezinje ngesifo seswekile okanye uxinzelelo lwegazi oluphezulu, zinokuchaphazela nexesha lakho lokuchacha.

Ngoko ke, ukuze wazi ukuba kuza kuthatha ixesha elingakanani na, kungcono ukuthetha nogqirha wakho.

Yintoni onokuyilindela ngexesha lokuchacha?

Emva kokuba ubuye ekhaya uvela esibhedlele, kuyinto eqhelekileyo ukuziva usoyika kancinci kwaye unesizungu xa ungekho koogqirha nabahlengikazi. Usapho lwakho lusenokuba luzibuza ukuba banokukunceda njani. Njengoko uqhela ubomi bakho obuqhelekileyo kancinci kancinci, ungalindela utshintsho oluncinci kwezi zinto zilandelayo:

• Inqanaba lomsebenzi wakho
• Indlela yokuzilolonga
• Ukutya neziselo
• Iimvakalelo zakho
• Ubomi besondo

Eyona nto ibalulekileyo kukugcina ulungelelwano phakathi kokuphumla kunye nomsebenzi ngeli xesha lokuchacha. Kufuneka ufumane ukuphumla okwaneleyo ukuze intliziyo yakho iphile. Kufuneka ubuyele kwimisebenzi yakho yesiqhelo ngokukhawuleza, ngokukhuselekileyo. Ukuzilolonga kubalulekile ukuze uphile. Ugqirha wakho uza kukukhokela kuyo yonke le nto.

Inqanaba lomsebenzi wakho liza kuba njani?

Ungaziva udiniwe kwaye ubuthathaka kwiveki yokuqala ubuyela ekhaya uvela esibhedlele. Oku kuqhelekile kakhulu.Ngenxa yokuba izihlunu zentliziyo yakho zonakele ngenxa yokuhlaselwa yintliziyo, kuthatha ixesha ukuphola. Kwakhona, oku kwenzeka xa uvuka ngequbuliso uye emsebenzini emva kokuphumla ebhedini. Ngoko ke, zinike ixesha lokuqhela kancinci kancinci imisebenzi yakho yesiqhelo.

Nazi ezinye iingcebiso zokukunceda kwiiveki zokuqala emva kokubuyela ekhaya:

• Nxiba yonke imihla kusasa. Ufanele ukwazi ukuhlamba nokunyamekela ucoceko lwakho.
• Qala ukwenza imisebenzi emincinci endlwini, kodwa kuphela xa uziva ukulungele. Izinto ezifana nokusonga impahla, ukunceda ekuphekeni, ukwenza igadi, ukucoca uthuli, kunye nokuhlamba izitya.
• Yandisa umsebenzi wakho imini yonke. Musa ukusebenza nzima ngaxeshanye. Ukuba uziva udiniwe, yima uphumle. Yenza umsebenzi oseleyo ngolunye usuku.
• Nciphisa inani lamaxesha okunyuka ngawo izinyuko. Ngaphandle kokuba ugqirha wakho uthi hayi, kulungile ukusebenzisa izinyuko ekhaya izihlandlo ezimbalwa ngemini. Kodwa musa ukuzenza umkhwa ukunyuka nokuhla rhoqo.
• Musa ukuqala ngequbuliso ukuphakamisa, ukutyhala, okanye ukutsala izinto ezinzima. Linda ude ugqirha wakho akuxelele ukuba kulungile.
• Landela imiyalelo kagqirha ngqo. Uza kukuxelela ukuba ungaqhuba nini, uye emsebenzini, kwaye uqale nini ukwenza imisebenzi enzima. Landela loo miyalelo ngqo. Musa ukuzibhokoxa kakhulu ngaxeshanye.
• Ukuba ukhe wafakwa i-catheter yentliziyo emva kokuhlaselwa yintliziyo, ugqirha wakho unokubeka imiqathango eyongezelelweyo okwethutyana ukuze ayeke ukopha kwindawo eyonzakeleyo. Landela le miqathango.

Zeziphi iindlela zokuzilolonga ezikunceda ukuba ululame?

Ukuzilolonga yinxalenye ebalulekileyo yokuchacha kwakho. Enye yezona ndlela zibalaseleyo zokubuyela kwisimo esifanelekileyo emva kokuhlaselwa yintliziyo kukujoyina inkqubo yokuvuselela intliziyo. Ezi nkqubo zisebenza nawe ukuphuhlisa inkqubo yokuzivocavoca ekhuselekileyo nejongiweyo efanelekileyo kuwe. Zikwakunceda wenze utshintsho olusempilweni kwindlela ophila ngayo—njengokutya ukutya okunempilo, ukulawula uxinzelelo, kunye nokuyeka ukutshaya. Thetha nogqirha wakho malunga neenkqubo zokuvuselela intliziyo onokuthatha inxaxheba kuzo.

Nokuba inkqubo yakho yokubuyisela umzimba iphelile, umthambo kufuneka ube yinxalenye yenkqubo yakho yemihla ngemihla. Ukuba ubungengomthambo omkhulu ngaphambi kokuba uhlaselwe yintliziyo, ngequbuliso ukuxelelwa ukuba uzilolonge yonke imihla kunokuba nzima. Nangona kunjalo, inkqubo yokubuyisela umzimba kwintliziyo iya kukunceda ukuba uqhele kancinci ukuzilolonga. Ngoko ke, xa iphelile, uya kuba nokuzithemba ngokwaneleyo ukuzilolonga wedwa. Musa ukudimazeka, ngamanyathelo amancinci anokwenza umahluko omkhulu ngokuhamba kwexesha.

Ukutya nokusela kufanele kube njani?

Ukuthintela iingxaki zexesha elizayo ezibangelwa sisifo sentliziyo, kubaluleke kakhulu ukulandela ukutya okunempilo kwentliziyo.Nangona kukho izicwangciso ezininzi zokutya okunempilo kwintliziyo, uphando lubonise ukuba iMediterranean Diet yeyona ilungileyo ekukhuseleni intliziyo yakho. Olu hlobo lokutya:

• Cwangcisa ukutya kwakho okuphambili ngokutya okusekwe kwizityalo okufana nemifuno, iziqhamo, iimbotyi kunye neenkozo ezipheleleyo.
• Ukutya iioyile ezisempilweni ezifana neoyile yomnquma, iiavokhado, kunye neenati.
• Yitya ukutya kwaselwandle, inkukhu engenamafutha amaninzi, amaqanda, kunye nobisi olunamafutha aphantsi ngokulinganisela.
• Ukunciphisa ukutya inyama ebomvu (inyama yenkomo, inyama yehagu, inyama yenkomo, inyama yemvu), ukutya okuqhotsiweyo kunye neelekese.

Uziva njani? (Impilo-ntle yengqondo)

Emva kokuhlaselwa yintliziyo, unokufumana iimvakalelo zokudakumba, umsindo, kunye noloyiko . Ezi ziimpendulo eziqhelekileyo, kwaye ziya kuphela kancinci kancinci njengoko ubuyela kwimisebenzi yakho yemihla ngemihla. Nazi ezinye izinto ezinokukunceda ujongane nezi mvakalelo:

• Vuka rhoqo kusasa unxibe ilokhwe. Musa ukuhlala ebhedini, musa ukuhlala unxibe iipijama zakho.
• Hambahamba kancinci yonke imihla. Kodwa kufuneka ulandele imiyalelo yokuzilolonga enikwe ngugqirha.
• Buyela kancinci kancinci kwizinto ozithandayo kunye nemisebenzi yakho yokuzonwabisa. Kodwa ungangenisi abantu abaninzi kakhulu ekhayeni lakho ngaxeshanye. Yandisa kancinci kancinci unxibelelwano lwakho loluntu njengoko uziva ukhululekile.
• Yabelana ngento oyicingayo. Thetha nomhlobo, ilungu losapho, umcebisi, okanye iqela lenkxaso.
• Lala kamnandi ebusuku. Ukungalali ngokwaneleyo kunokukwenza uzive udiniwe kwaye unomsindo. Ukuze ulale lula ebusuku, kuphephe ukulala kakhulu emini.
• Bandakanya kwinkqubo yokuvuselela intliziyo. Olu hlobo loqeqesho olukhokelwayo kunye nenkqubo yokufundisa lunokukunika isiqabu sengqondo.
• Musa ukoyika ukubuza imibuzo. Buza iqela lakho lezonyango nanini na xa unombuzo. Qonda intsingiselo yamagama ezonyango kunye nesicwangciso sakho sonyango. Ukufunda ngesifo sentliziyo kunye nendlela yokuphila naso kuya kukunika amandla amaninzi. Wena

Okukhona unolwazi oluthe kratya, kokukhona uya kukwazi ukwenza izigqibo eziluncedo kwimpilo yakho.

Ngaba singafunda nangezenzo zesondo?

Ukuba ungaphinda ulale ngesondo ixesha elide kangakanani kuxhomekeke ekubeni loluphi unyango olufumeneyo kunye nendlela oziva ngayo ngoku. Ukuba wenze utyando lwentliziyo evulekileyo, kuya kuthatha malunga neeveki ezine ukuya kwezintandathu ukuba ithambo lakho lesifuba liphole. Ngoko ke, kufuneka uphephe ukulala ngesondo kude kube ngoko.

Ukuba awukatyandwa, kufuneka ukwazi ukulala ngesondo malunga neeveki ezimbini ukuya kwezine emva kokuhlaselwa yintliziyo. Jonga indlela oziva ngayo kunye nokuba amandla akho angakanani. Ukuba unokunyuka izinyuko ezimbini ngaphandle kwentlungu esifubeni sakho, unokuba namandla aneleyo okwenza isondo.

Ezi zinto ziya kukunceda njengoko ubuyela kubomi obuqhelekileyo:

• Thetha ngokukhululekileyo neqabane lakho malunga nendlela oziva ngayo kunye namandla akho.
• Fumana ezinye iindlela zokwabelana ngokusondelelana neqabane lakho.
• Yenzani isondo xa niphumle kwaye nikhululekile ngokwasemzimbeni .
• Yiyani ngesondo ubuncinane iiyure ezimbini emva kokutya isidlo esimnandi .
• Thetha nogqirha wakho ukuba uneengxaki. Isifo sentliziyo kunye namayeza athile anokubangela ukungasebenzi kakuhle ngokwesondo. Ukuba kunjalo, awuwedwa. Thetha nogqirha wakho ukuze ufumane inkxaso oyifunayo.

Ngaba intliziyo iphola ngokupheleleyo emva kokuhlaselwa yintliziyo?

Intliziyo yakho ingaphila emva kokuhlaselwa yintliziyo, kodwa kuthatha ixesha. Kwakhona, ukuhlaselwa yintliziyo kungashiya umonakalo entliziyweni, obizwa ngokuba yi-'scar tissue'. Ubungakanani balo monakalo buyahluka ngokuxhomekeke kwi:

• Ixesha lonyango: Okukhona ufumana unyango ngokukhawuleza, kokukhona umonakalo entliziyweni yakho uya kuba mncinci.
• Apho umthambo uvalekile khona: Imithambo yakho yentliziyo inika igazi kwiindawo ezahlukeneyo zentliziyo yakho. Xa umthambo omnye uvalekile, inxalenye yentliziyo yakho enikwa ngulo mthambo iyanqanyulwa ukuhamba kwegazi. Ngoko ke, ubungakanani bomonakalo entliziyweni yakho buxhomekeke ekubeni ivalekile phi na kwaye ingakanani intliziyo yakho leyo mthambo inika igazi rhoqo.

Kungathatha ukuya kuthi ga kwiinyanga ezimbini ukuba izihlunu zentliziyo yakho ziphiliswe. Nangona kunjalo, izicubu ezisele zinokwenza kube nzima ukuba intliziyo yakho ipompe igazi. Ekuhambeni kwexesha, oku kunokukhokelela kwezinye iingxaki, ezifana nokusilela kwentliziyo. Thetha nogqirha wakho malunga nobungakanani bomonakalo entliziyweni yakho kunye noko ungakulindela.

Ngaba kunokwenzeka ukuba uphile ngokupheleleyo emva kokuhlaselwa yintliziyo?

Abantu abaninzi bayachacha ngokupheleleyo kwisifo sentliziyo baze baphile ubomi obude. Kodwa kufuneka wazi ukuba usemngciphekweni. Malunga nomntu omnye kwabahlanu abaneminyaka engama-45 nangaphezulu uya kuba nesifo sentliziyo sesibini kwiminyaka emihlanu. Oku kuthetha ukuba imizamo yokuthintela ibaluleke kakhulu ukuba ufuna ukunciphisa umngcipheko wakho kwaye uhlale usempilweni ixesha elide.

Ndingakuthintela njani ukuhlaselwa yintliziyo kwakhona?

Emva kokuhlaselwa yintliziyo, kubalulekile ukwenza konke okusemandleni akho ukuthintela umonakalo onokwenzeka kwintliziyo yakho kwixesha elizayo. Ugqirha wakho uza kukunika iingcebiso eziphathelele wena kunye nemeko yakho. Ngezantsi kukho iingcebiso ezibanzi zokunceda intliziyo yakho ihlale isempilweni.

Ngaba kufuneka ndisebenzise amayeza kanye njengoko ndixelelwe?

Ewe, ngokuqinisekileyo! Emva kokuhlaselwa yintliziyo, ugqirha wakho uza kukunika amayeza kwezi zinto:

• Thintela ukuqhekeka kwegazi kwixesha elizayo.
• Yehlisa umthwalo entliziyweni yakho kwaye uphucule ukusebenza kwentliziyo kunye nokuchacha kwayo.
• Yehlisa amanqanaba akho e-cholesterol.

Ukuba kuyimfuneko, ugqirha angakunika amayeza kwezi zinto:

• Nyanga iingxaki zesingqisho sentliziyo (arrhythmias).
• Yehlisa uxinzelelo lwakho lwegazi.
• Lawula i-angina (iintlungu zesifuba okanye ukungakhululeki).
• Nyanga ukusilela kwentliziyo.

Ugqirha wakho uza kukuchazela amayeza akho. Ungalibali ukubuza nayiphi na imibuzo onayo malunga namayeza owasebenzisayo, zeziphi iziphumo ebezingalindelekanga ezinokuba nazo, kunye nesizathu sokuba uwasebenzise.

Nokuba uzive uphilile ngokupheleleyo, thatha onke amayeza owanikwe ngugqirha wakho ngexesha. Amayeza akho ngawo akugcine uphilile. Ukuba uneziphumo ebezingalindelekanga, zibhale phantsi kwincwadi yokubhala uze uxelele ugqirha wakho xa zenzeka.

Okokugqibela, yenza uluhlu lwamayeza owasebenzisayo kwaye uhlale unawo ngamaxesha onke. Uluhlu kufuneka luquke oku kulandelayo:

• Amagama amayeza.
• Ukuchaza isizathu sokuba uthabathe amayeza onke.
• Limele lisetyenziswe kangaphi kwaye ngaliphi ixesha iyeza ngalinye.

Ngaba ufuna ukwenza utshintsho kwindlela ophila ngayo?

Ewe, oku kubaluleke kakhulu. Asinakutshintsha ezinye zezinto ezinokubangela isifo semithambo yegazi (ezifana nobudala kunye nembali yosapho). Nangona kunjalo, kukho izinto onokuzenza ukunciphisa umngcipheko wakho. Thetha nogqirha wakho ngale nto uze ucele uncedo:

• Ukuba uyatshaya, uvape, okanye usebenzisa nayiphi na enye imveliso yecuba, yeka ngokupheleleyo. Ukusebenzisa icuba yeyona nto ibalulekileyo enokubangela umngcipheko wesifo semithambo yegazi. Ukuyeka akulula, kodwa kunokwenza umahluko omkhulu kwimpilo yentliziyo yakho.
• Nciphisa utywala. Ukuba kunokwenzeka, yeka ngokupheleleyo, okanye unciphise njengoko ugqirha wakho ecebisa.
• Landela indlela yokutya ehlisa amanqanaba akho e-cholesterol. Buza ugqirha wakho okanye ingcali yesondlo ukuba iMediterranean Diet okanye enye indlela yokutya ikulungele na.
• Gcina ubunzima obusempilweni. Xa utyeba, intliziyo yakho kufuneka isebenze nzima ukupompa igazi liye emzimbeni wakho wonke. Ukutyeba kakhulu kwandisa umngcipheko wakho woxinzelelo lwegazi oluphezulu, i-cholesterol ephezulu, kunye nesifo seswekile. Buza ugqirha wakho ukuba loluphi ubunzima obufanelekileyo kunye nento onokuyenza ukuze ufike apho.
• Yenza umthambo ube yinxalenye yemisebenzi yakho yemihla ngemihla. Ukuzilolonga rhoqo kunokunyusa amanqanaba akho amandla, kunciphise i-cholesterol, kulawule ubunzima bakho, kwaye kunciphise uxinzelelo. Thetha nogqirha wakho ngaphambi kokuba uqalise naluphi na ucwangciso lokuzilolonga.
• Lawula isifo seswekile. Uphando lubonise ukuba amanqanaba aphezulu eswekile egazini andisa umngcipheko wesifo semithambo yegazi. Isifo seswekile sinokulawulwa ngokutshintsha indlela yokutya, ukuzilolonga, kunye namayeza.
• Lawula uxinzelelo lwegazi oluphezulu. Uxinzelelo lwegazi oluphezulu lungonakalisa ulwelo lwemithambo yakho yentliziyo, nto leyo ekhokelela kwisifo semithambo yentliziyo. Ukutya okunetyuwa encinci, umthambo, kunye namayeza kunokunceda ukugcina uxinzelelo lwegazi lwakho lukwinqanaba elifanelekileyo.
• Zama ukugcina ingqondo yakho ikhululekile ngamaxesha onke. Izinto ezifana neyoga, ukucamngca, kunye nokuzilolonga ngokuphefumla nzulu kunokukunceda ukulawula uxinzelelo kunye nomsindo. Ezi mvakalelo zikwanyusa umngcipheko wesifo semithambo yegazi.

Ngaba ufuna ukubona ugqirha rhoqo?

Ewe, oko kubalulekile. Uza kuba nedibano yokulandelela emva kweeveki ezine ukuya kwezintandathu emva kokuba uphumile esibhedlele. Ugqirha uza kujonga inkqubela yakho yokuchacha.

Kuya kufuneka wenze uvavanyo rhoqo, olufana novavanyo loxinzelelo lokuzilolonga. Olu vavanyo luvumela ugqirha wakho ukuba ajonge intliziyo yakho aze ajonge ukuba akukho nto intsha okanye eyonakeleyo.

Ukuba unale mpawu, fowunela ugqirha wakho ngaphandle kokulinda idinga:

• Ukuba i-angina ivela rhoqo, iyanda ngamandla, ihlale ixesha elide, okanye isasazeke kwezinye iindawo.
• Ubunzima bokuphefumla, ingakumbi xa uphumle.
• Isiyezi.
• Ukuphazamiseka kwentliziyo.

Yintoni omele uyenze ukuba une-angina?

I-Angina luphawu lokuba intliziyo yakho ayifumani igazi elaneleyo elineoksijini eninzi. I-Angina ingavakalelwa ngolu hlobo:

• Uziva ungakhululekanga, uxinzelelo, ubunzima, okanye intlungu esifubeni sakho. Olu luvo lunokusasaza nasemqolo, emhlathini, emqaleni, okanye engalweni.
• Ukuziva ugcwele, ukungagayi kakuhle kokutya, okanye ukuqhina.

Oku kunokwahluka kumntu nomntu, kodwa kudla ngokuvakala ngendlela efanayo ngalo lonke ixesha. Oko kukuthi, xa une-angina, uhlala uziva ngendlela efanayo.

Kuqhelekile ukuba noloyiko xa une-angina emva kokuhlaselwa yintliziyo. Landela imiyalelo kagqirha wakho malunga nento omawuyenze kwimeko enjalo. Nazi ezinye iingcebiso ngokubanzi:

1. Yeka into obuyenza. Hlala phantsi uphumle.

2. Ukuba une-nitroglycerin, beka ipilisi enye phantsi kolwimi lwakho uze uyivumele inyibilike. Okanye, fafaza i-nitroglycerin spray phantsi kolwimi lwakho.

3. Linda imizuzu emihlanu.

4. Ukuba usenayo i-angina emva kwemizuzu emihlanu, fowunela ku-1990 (inkonzo ye-ambulensi engxamisekileyo yaseSri Lanka) ngoko nangoko. Musa ukulibazisa.

5. Igosa leziko leefowuni ezingxamisekileyo lingakuxelela ukuba uhlafune kwaye uginye i-aspirin (ngaphandle kokuba unesizathu sezonyango sokungayithathi i-aspirin). Ukusela i-aspirin kwangethuba xa uhlaselwe yintliziyo kunokuphucula indlela ochacha ngayo.

6. Musa ukuqhuba imoto uye esibhedlele wedwa.Abasebenzi bezonyango abangxamisekileyo bangaqala unyango apho ukuze bancede ekusindiseni intliziyo yakho.

Khumbula, ukuba unikwe i-nitroglycerin, hlala ugcina i-nitroglycerin yakho. Kwakhona khumbula ezi zinto zilandelayo:

• I-Nitroglycerin iza ngohlobo lweepilisi okanye isitshizi.
• Ufanele ugcine i-nitroglycerin yakho kwibhotile emnyama, kude nobushushu nokufuma.
• Jonga umhla wokuphelelwa kwebhotile. Ufanele uthenge entsha zingadlulanga iinyanga ezintandathu emva kokuba uyivulile.

Okokugqibela, ezona zinto zibalulekileyo ekufuneka uzikhumbule (Umyalezo Wokuya Ekhaya)

Ukuchacha emva kokuhlaselwa yintliziyo luhambo oluthatha ixesha, umonde, kunye nendlela entsha yokucinga ngempilo-ntle yakho. Kunokuba nzima ukufumana ixesha lokubeka impilo yakho phambili kunye neminye imisebenzi onayo imini yonke. Nangona kunjalo, ukuhlaselwa yintliziyo sisikhumbuzo esinamandla sokuba umzimba wakho udinga ukhathalelo olungakumbi.

Ngoku lixesha lokuqala ubomi bakho ngokutsha kwaye ugxile kwizinto eziza kunceda impilo yakho yexesha elide. Sebenzisana nogqirha wakho ukuze wenze isicwangciso esinempilo yentliziyo sekamva lakho. Sikunqwenelela ukuchacha ngokukhawuleza!

Uhlaselo lwentliziyo , Ukubuyela kwiSifo seNtliziyo, Ukuvuselelwa kwentliziyo, Impilo yentliziyo, Utshintsho kwindlela yokuphila, Ukuzilolonga, Ukutya okunempilo, Uhlaselo lwentliziyo, Ukubuyela kwiSifo seNtliziyo, Ukuhlaziywa kwentliziyo, Utshintsho kwindlela yokuphila, I-Angina, iNitroglycerin