(n.) A hollow, muscular organ, which, by contracting rhythmically, keeps up the circulation of the blood.
(n.) The seat of the affections or sensibilities, collectively or separately, as love, hate, joy, grief, courage, and the like; rarely, the seat of the understanding or will; -- usually in a good sense, when no epithet is expressed; the better or lovelier part of our nature; the spring of all our actions and purposes; the seat of moral life and character; the moral affections and character itself; the individual disposition and character; as, a good, tender, loving, bad, hard, or selfish heart.
(n.) The nearest the middle or center; the part most hidden and within; the inmost or most essential part of any body or system; the source of life and motion in any organization; the chief or vital portion; the center of activity, or of energetic or efficient action; as, the heart of a country, of a tree, etc.
(n.) Courage; courageous purpose; spirit.
(n.) Vigorous and efficient activity; power of fertile production; condition of the soil, whether good or bad.
(n.) That which resembles a heart in shape; especially, a roundish or oval figure or object having an obtuse point at one end, and at the other a corresponding indentation, -- used as a symbol or representative of the heart.
(n.) One of a series of playing cards, distinguished by the figure or figures of a heart; as, hearts are trumps.
(n.) Vital part; secret meaning; real intention.
(n.) A term of affectionate or kindly and familiar address.
(v. t.) To give heart to; to hearten; to encourage; to inspirit.
(v. i.) To form a compact center or heart; as, a hearting cabbage.
Example Sentences:
(1) The extents of phospholipid hydrolysis were relatively low in brain homogenates, synaptic plasma membranes and heart ventricular muscle.
(2) A 2.5-month-old child with cyanotic heart disease who required long-term PGE1 infusions; developed widespread periosteal reactions during the course of therapy.
(3) It was found that the skeletal muscle enzyme of the chick embryo is independent of the presence of creatine and consequently is another constitutive enzyme like the creatine kinase of the early embryonic chick heart.
(4) This may have significant consequences for people’s health.” However, Prof Peter Weissberg, medical director of the British Heart Foundation, which funded the work, said medical journals could no longer be relied on to be unbiased.
(5) Spectral analysis of spontaneous heart rate fluctuations, a powerful noninvasive tool for quantifying autonomic nervous system activity, was assessed in Xenopus Laevis, intact or spinalized, at different temperatures and by use of pharmacological tools.
(6) Among the pathological or abnormal ECGs (25.6%) prevailed the vegetative-functional heart diseases with 92%.
(7) Propranolol resulted in a significantly lower mean hourly, mean 24 h and minimum heart rate.
(8) Heart rate (HR), pulmonary ventilation (V), oxygen consumption (VO2), carbon dioxide production (VCO2), and respiratory quotient (RQ) were measured.
(9) Coronary arteritis has to be considered as a possible etiology of ischemic symptoms also in subjects who appear affected by typical atherosclerotic ischemic heart disease.
(10) A full-length cDNA encoding porcine heart aconitase was derived from lambda gt10 recombinant clones and by amplification of the 5' end of the mRNA.
(11) report the complications registered, in particular: lead's displacing 6.2%, run away 0.7%, marked hyperthermya 0.0%, haemorrage 0.4%, wound dehiscence 0.3%, asectic necrosis by decubitus 5%, septic necrosis 0.3%, perforation of the heart 0.2%, pulmonary embolism 0.1%.
(12) Western blot analysis of these mitochondria using an antibody against carnitine palmitoyltransferase II purified from beef heart demonstrates a 68-kDa protein, which under ischemic conditions apparently is decreased by 2 kDa.
(13) The strongest predictor of non-sudden cardiac death was the New York Heart Association functional class.
(14) Road traffic accidents (RTAs) comprised 40% and ischaemic heart disease (IHD) 13% of the total.
(15) At the heart of the payday loan profit bonanza is the "continuous payment authority" (CPA) agreement, which allows lenders to access customer bank accounts to retrieve funds.
(16) The role of O2 free radicals in the reduction of sarcolemmal Na+-K+-ATPase, which occurs during reperfusion of ischemic heart, was examined in isolated guinea pig heart using exogenous scavengers of O2 radicals and an inhibitor of xanthine oxidase.
(17) Complete heart block was produced in 20 of 20 dogs.
(18) low molecular weight dextran in the course of right heart catheterization.
(19) Myocardial ischaemia was induced in perfused rabbit hearts by ligating the left main coronary artery.
(20) In the stage 24 chick embryo, a paced increase in heart rate reduces stroke volume, presumably by rate-dependent decrease in passive filling.
Pith
Definition:
(n.) The soft spongy substance in the center of the stems of many plants and trees, especially those of the dicotyledonous or exogenous classes. It consists of cellular tissue.
(n.) The spongy interior substance of a feather.
(n.) The spinal cord; the marrow.
(n.) Hence: The which contains the strength of life; the vital or essential part; concentrated force; vigor; strength; importance; as, the speech lacked pith.
(v. t.) To destroy the central nervous system of (an animal, as a frog), as by passing a stout wire or needle up and down the vertebral canal.
Example Sentences:
(1) Finally, fosinopril had no effect on the pressor or chronotropic effects of norepinephrine (NE) or 1,1-dimethyl-4-phenylpiperinium (DMPP) or electrical stimulation of the sympathetic ganglia of pithed rats.
(2) Relatively weaker GUS activity was also detected in pith parenchyma.
(3) Both d- and l-amphetamine were also compared for their pressor and tachycardic activity in pithed rats.
(4) Intravenous administration of T-2 to pithed rats did not alter blood pressure or heart rate at a time when, in conscious rats, both blood pressure and heart rate were increased.
(5) Monoiodo-Ang II was found to be a potent, full agonist in in vivo bioassays and a more potent (2.5-fold) pressor agent than the native hormone Ang II in the pithed rat.
(6) APP 201-533 [3-amino-6-methyl-5-phenyl-2(1H)-pyridinone] was investigated in vivo in anesthetized and unanesthetized dogs and pithed open-chest cats and in vitro in guinea pig atria and papillary muscles, skinned muscle fibers from pig hearts, and rat myocardium.
(7) The effects of quinpirole, a specific dopamine DA2 receptor agonist, on autonomic nervous control of heart rate, were studied in normotensive pithed rats, by analysing its action on the tachycardia and bradycardia evoked by electrical stimulation of the cardioaccelerator (10 V; 1 ms; 0.5, 1, 3, 6 Hz) and vagus (10 V; 1 ms; 3, 6, 9 Hz) nerves respectively.
(8) Pith cells can shift from the C- to the C+ state by a process known as habituation.
(9) The pressor actions of ET3 and arginine vasopressin (AVP) were compared with one another in pithed rats in the presence of the calcium channel activator BAY K 8644 or the calcium channel antagonist nifedipine i.a.
(10) Both human endothelin 1 (ET1) and rat endothelin 3 (ET3) produced dose-dependent pressor effects in the pithed rat.
(11) Viprostol did not antagonize the tachycardia induced by stimulation of the discrete segments at C7-T1 (cardio-accelerator) of the spinal cord in pithed SHR, suggesting that viprostol did not activate the presynaptic alpha-adrenoceptors.
(12) In pithed rats, the vasopressor response to dihydroergotoxine was reduced competitively by yohimbine, and non-competitively by nifedipine, but not by prazosin or methysergide, showing that the vasoconstriction is mediated by alpha 2-adrenoceptors.
(13) The antagonistic effects of a new inositol phosphate derivative, D-myoinositol-1,2,6-trisphosphate (PP56), on pressor responses to preganglionic sympathetic nerve stimulation and exogenously administered phenylephrine or neuropeptide Y (NPY) were investigated in vivo in the pithed rat.
(14) We conclude that in contrast to the increase in diastolic pressure elicited by B-HT 920, calcium channels are not involved in the cirazoline-induced pressor responses in the pithed cat.
(15) Acute or chronic adrenalectomy did not alter the pressor responses and chronotropic effect of angiotensin in the pithed rat.
(16) Habituated cells derived from inducible pith cells give rise to normal plants whose leaf and pith tissues require cytokinin for growth in culture.
(17) The endovenous perfusion of the splenic material in acidified and alkalinized forms caused significant increases of the mean blood pressure in normal, vagotomized and pithed rats, showing that, in contradiction to previous reports, changes in pH did not affect its hypertensive activity.
(18) The dose-response curves of three alpha-agonists noradrenaline, St 587 and B-HT 933 in pithed rats were shifted rightwards by pretreatment (i.v.
(19) In pithed rats, only pindolol produced a definite fall of blood pressure.
(20) The bradycardia was reduced but not blocked by pre-treatment with guanethidine, yohimbine, propranolol or pithing.