Previous studies have shown that paeonol can antagonize acute myocardial ischemia and infarction in rat. This study further researched the effects of paeonol on blood pressure and blood flow in the artery of spontaneously hypertensive rats and its mechanisms related on vasomotion. Firstly, thirty spontaneously hypertensive rats were randomly divided into spontaneously hypertensive control group and paeonol-treating groups of high dose and low dose, and also, the other ten Wistar rats as healthy control group. Before and after the intraduodenal administration of the drug, arterial blood pressure was measured by carotid artery and blood flow through the renal artery and carotid artery in vivo were measured by animal flowmeter. The same volume of solvent was given to the spontaneously hypertensive control group and the healthy control group, and the other operations were same. In order to further study the effect of paeonol on vasomotor function, the superior mesenteric artery, renal artery and coronary artery of the spontaneously hypertensive rat were removed and separated, precontracted by a certain concentration of potassium chloride (KCl) and 5-serotonin (5-HT) respectively, and dilatory responses were assessed by cumulative addition of paeonol. Results showed that after duodenal one-time delivery of paeonol, the blood pressure significantly lowered, the renal arterial blood flow and the carotid arterial blood flow significantly increased in spontaneously hypertensive rat. And also, paeonol relaxed the mesenteric artery, renal artery and the coronary artery of spontaneously hypertensive rat in a concentration-dependent manner. These results indicated that the effect of paeonol on decreasing arterial blood pressure and increasing the arterial blood flow was related to its vasodilative effect.
Acetophenones ; pharmacology ; Animals ; Blood Pressure ; drug effects ; Male ; Rats ; Rats, Inbred SHR ; Regional Blood Flow ; drug effects ; Vasodilator Agents ; pharmacology

The reliability and reliable indexes of quantitative assessment of coronary flow reserve (CFR) by using time-intensity curve (TIC) via myocardial contrast echocardiography were investigated. The TIC variables were obtained by employing acoustic densitometry (AD) technique before and after acetylcholine (Ach) injection in 12 dogs. Meanwhile, the correlation between these variables and CFR was analyzed. Among the variables derived from TIC, peak intensity (PI), area under the curve (AUC) and descending slope (DS) were increased significantly (P < 0.05) with the increase of coronary blood flow after Ach injection. Conversely, time-to-peak (TP), half-time of descent (HT), and mean-transit-time (MTT) were decreased remarkably (P < 0.0001). The PI and AUC ratios from post- to pre-Ach injection were strongly associated with CFR with the correlation coefficient (r) being 0.8366 and 0.8824, respectively. It is reliable by using the variables derived from TIC with myocardial contrast echocardiography to quantitatively evaluate regional myocardial CFR. The PI and AUC ratios from post- to pre-Ach injection are the reliable indexes for quantitative assessment of CFR.
Blood Flow Velocity/physiology ; Contrast Media ; Coronary Circulation/*physiology ; Coronary Vessels/physiology ; Coronary Vessels/ultrasonography ; *Echocardiography/methods ; *Image Processing, Computer-Assisted ; Observer Variation ; Regional Blood Flow/drug effects ; Regional Blood Flow/physiology ; Reproducibility of Results ; Ultrasonography, Interventional

Adolescent ; Adrenergic beta-Agonists ; therapeutic use ; Adult ; Asthma ; drug therapy ; Bronchodilator Agents ; therapeutic use ; Butylamines ; therapeutic use ; Ethanolamines ; therapeutic use ; Female ; Heart Rate ; drug effects ; Hemodynamics ; drug effects ; Humans ; Injections, Subcutaneous ; Male ; Regional Blood Flow ; drug effects ; Resorcinols ; therapeutic use

AIMTo investigate the impact of 8-(N,N-diethylamino)-n-octyl-3,4,5-trimethoxybenzoate (TMB-8) on the change of cerebral blood flow(CBF) induced by 5-HT or KCl in rats.

METHODSThe CBF in rats was measured by a Laser-Doppler flowmeter. The cranial window field was superfused with artificial cerebral spinal fluid containing TMB-8, 5-HT or KCl.

RESULTS12.5, 25 and 50 mumol.L-1 TMB-8 showed no significant effect on rest CBF in rats. 12.5, 25 and 50 mumol.L-1 TMB-8 apparently inhibited the decline of CBF evoked by 1 or 2 mumol.L-1 5-HT. When persistent reduction of CBF were evoked by 1 mumol.L-1 5-HT, TMB-8 markedly increased the CBF in a concentration-dependent manner. The reduction of CBF induced by 20 or 40 mmol.L-1 KCl was also suppressed by 12.5, 25 and 50 mumol.L-1 TMB-8. While persistent reduction of CBF was evoked by 20 mmol.L-1 KCl. TMB-8 markedly increased the CBF in a concentration-dependent manner.

CONCLUSIONThese results indicate that TMB-8 is effective in preventing and treating the reduction of CBF induced by 5-HT or KCl, and improved the supply of blood in rat brain during ischemia.

Animals ; Brain ; blood supply ; drug effects ; Calcium Channel Blockers ; pharmacology ; Drug Interactions ; Gallic Acid ; analogs & derivatives ; pharmacology ; Potassium Chloride ; antagonists & inhibitors ; Rats ; Rats, Sprague-Dawley ; Regional Blood Flow ; drug effects ; Serotonin Antagonists ; pharmacology

The reliability and reliable indexes of quantitative assessment of coronary flow reserve (CFR) by using time-intensity curve (TIC) via myocardial contrast echocardiography were investigated. The TIC variables were obtained by employing acoustic densitometry (AD) technique before and after acetylcholine (Ach) injection in 12 dogs. Meanwhile, the correlation between these variables and CFR was analyzed. Among the variables derived from TIC, peak intensity (PI), area under the curve (AUC) and descending slope (DS) were increased significantly (P < 0.05) with the increase of coronary blood flow after Ach injection. Conversely, time-to-peak (TP), half-time of descent (HT), and mean-transit-time (MTT) were decreased remarkably (P < 0.0001). The PI and AUC ratios from post- to pre-Ach injection were strongly associated with CFR with the correlation coefficient (r) being 0.8366 and 0.8824, respectively. It is reliable by using the variables derived from TIC with myocardial contrast echocardiography to quantitatively evaluate regional myocardial CFR. The PI and AUC ratios from post- to pre-Ach injection are the reliable indexes for quantitative assessment of CFR.
Animals ; Blood Flow Velocity ; physiology ; Contrast Media ; Coronary Circulation ; physiology ; Coronary Vessels ; diagnostic imaging ; physiology ; Dogs ; Echocardiography ; methods ; Image Processing, Computer-Assisted ; Observer Variation ; Regional Blood Flow ; drug effects ; physiology ; Reproducibility of Results ; Ultrasonography, Interventional

Cerebrovascular Circulation ; drug effects ; Computer Systems ; Fibrinolytic Agents ; administration & dosage ; pharmacology ; Humans ; Infarction, Middle Cerebral Artery ; drug therapy ; physiopathology ; Infusions, Intravenous ; Male ; Middle Aged ; Regional Blood Flow ; drug effects ; Thrombolytic Therapy ; Tissue Plasminogen Activator ; administration & dosage ; pharmacology

OBJECTIVETo compare the therapeutic effects of routine acupuncture, the electroacupuncture and the combined therapy of electroacupuncture and acupoint injection.

METHODSNinety-one cases were randomly divided into a routine acupuncture group (30 cases), an electroacupuncture group (31 cases), and a combined therapy of electroacupuncture and acupoint injection group (30 cases). Zusanli (ST 36), Fengchi (GB 20), Anmian (Extra), Taiyang (EX-HN 5), Hegu (LI 4), Yintang (EX-HN 3), Baihui (GV 20) and Sishengcong (EX-HN 1) were selected among 3 groups. Even manipulation was applied in routine acupuncture group; G 6805 electroacupuncture apparatus was added in electroacupuncture group; in combined therapy of electroacupuncture and acupoint injection group, electroacupuncture was applied, besides, Vitamin B12 0.5 mg and 0.2%/ Lidocaine 2 mL were injected at Fengchi (GB 20) and Anmian (Extra). Twenty treatments were given in 4 weeks. The changes of average blood flow of vertebral artery and basilar artery before and after treatment were observed and graded by the cervical vertigo syndrome and function score; the therapeutic effects were evaluated as well.

RESULTSThe average blood flow of vertebral artery and basilar artery, and the cervical vertigo syndrome and function score were improved in 3 groups (all P < 0.01), in which, it was more obvious in combined therapy of electroacupuncture and acupoint injection group than in others (P < 0.05, P < 0.01), and it in electroacupuncture group was superior to that in routine acupuncture group (P < 0.05). The effective rate was 63.3% (19/30) in routine acupuncture group, 80.6% (25/31) in electroacupuncture group and 90.3% (28/30) in combined therapy of electroacupuncture and acupoint injection group, indicating the significant differences among them (P < 0.05, P < 0.01).

CONCLUSIONThe routine acupuncture, electroacupuncture, and combined therapy of electroacupuncture and acupoint injection are effective for cervical vertigo; the combined therapy is the best, and electroacupuncture comes second. It illustrates that the routine acupuncture, electroacupuncture, and combined therapy of electroacupuncture and acupoint injection have additive effects on treatment of cervical vertigo.

Acupuncture Points ; Aged ; Electroacupuncture ; Female ; Humans ; Injections ; Lidocaine ; administration & dosage ; Middle Aged ; Regional Blood Flow ; drug effects ; Treatment Outcome ; Vertebral Artery ; drug effects ; physiopathology ; Vertigo ; drug therapy ; physiopathology ; therapy ; Vitamin B 12 ; administration & dosage

OBJECTIVETo assess the effect and safety of intra-coronary administration of anisodamine on "slow-reflow" phenomenon of infarct related artery (IRA) following primary percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI).

METHODSTwenty-five patients with slow-reflow phenomenon screened out from 153 AMI patient with post-PCI reflow IRA were enrolled. They were 17 males and 8 females; aged (62.3 +/- 9.3) years; 10 with focal artery at left anterior descendens, 5 in circumflux and 10 in right coronary artery; PCI was successfully performed on them about 7.11 +/- 2.31 h after the onset of angina pectoris and the post-operation mean TIMI flow was 1.75 +/- 0.42 grade. Nitroglycerin (200 microg) was injected into coronary previously for confirming the slow-reflow phenomenon as control, then the injection of anisodamine 500 microg 10 min later. Coronary arteriography (CAG) was performed at the 1 st, 3 rd and 10 th min after the medication. Gibson's TIMI frame count method and quantitative computer angiography (QCA) system was used to quantitatively detect the frames of blood flow and the diameter of arterial lumen at different time points after nitroglycerin or anisodamine administration. Hemodynamics and changes of electrocardiogram were determined.

RESULTS(1) No significant change in frames of blood flow was found between before and 1 min after intra-coronary administration of nitroglycerin (82.79 +/- 9.30 frames vs 78.43 +/- 9.37 frames, P >0. 05) after operation; but 1, 3 and 10 min after injection of anisodamine, it was decreased 46.25 +/- 4.55, 44.52 +/- 4.52 and 43.09 +/- 4.18, respectively, all P <0. 01, and the average coronary blood flow increased from TIMI grade 1.75 +/- 0.42 to grade 2.70 +/- 0.45 (t = 0. 34, P < 0.05). (2) The diameter of middle segment of reopened coronary artery slightly increased from 3.2 +/- 0.3 mm to 3.3 +/- 0.4 mm 3 min after anisodamine injection, but without statistical significance (P >0. 05). (3) Successive monitoring at 10 min after anisodamine injection showed that all the parameters, including intra-coronary pressure, peripheral blood pressure, P-R interval, Q-T interval and QRS duration were not changed significantly (P > 0.05), only the heart rate increased for 15-19 beats/min, but did not induce tachycardia or other malignant arrhythmia.

CONCLUSIONIntra-coronary administration of anisodamine 500 microg could improve the post-PCI slow-reflow phenomenon, it is safe and convenient, and may be taken as an effective approach for treatment of the illness.

Acute Disease ; therapy ; Adult ; Aged ; Angioplasty, Balloon, Coronary ; Coronary Vessels ; drug effects ; physiopathology ; Female ; Humans ; Injections ; Male ; Middle Aged ; Myocardial Infarction ; drug therapy ; physiopathology ; surgery ; Regional Blood Flow ; drug effects ; Solanaceous Alkaloids ; administration & dosage

In the present study, we tested whether maintenance of adequate cerebral perfusion pressure (CPP) by pharmacologically preventing systemic hypotension with dopamine infusion would prevent cerebral ischemia and attenuate energy depletion and neuronal injury even though intracranial pressure remains elevated in a newborn piglet meningitis model. Cerebral blood flow, measured at the end of the experiment using fluorescent microspheres, was significantly increased by dopamine infusion. The decreased cerebral cortical cell membrane Na+, K+-ATPase activity and increased lipid peroxidation products, indicative of meningitis-induced brain damage, were significantly attenuated by dopamine infusion. Dopamine also significantly attenuated the meningitis-induced reduction in both brain ATP and phosphocreatine levels and the increase in brain lactate level. In summary, maintenance of adequate CPP with dopamine prevented cerebral ischemia, reduced cerebral energy depletion, and attenuated brain injury in neonatal bacterial meningitis.
Animals ; Animals, Newborn ; Brain/cytology/drug effects/*physiology ; Cell Membrane/*metabolism ; Cerebrovascular Circulation/*drug effects ; Dopamine/metabolism/*pharmacology ; Fluorescent Dyes/metabolism ; Hemodynamic Processes ; Meningitis, Escherichia coli/*metabolism ; Microspheres ; Random Allocation ; Regional Blood Flow ; Support, Non-U.S. Gov't ; Swine

OBJECTIVETo explore an efficacious therapy for arterial erectile dysfunction (ED) by observing the effect of the Chinese traditional medicine Zhenyangjian on the penile hemodynamics of the patient.

METHODSForty-seven patients with arterial ED, aged from 40 to 49 years, were treated with Zhenyangjian for 1 month. Intracavernous injection of papaverine and phentolamine (30 mg/l mg) was given and multifunctional color Doppler ultrasound was used to measure the peak systolic velocity(PSV) of the corpus cavernous arteries before and after Zhenyangjian administration.

RESULTSThe PSV of the penis corpus cavernous arteries was obviously ameliorated in all the patients (P < 0.05).

CONCLUSIONThe Chinese traditional medicine Zhenyangjian can promote penile erection effectively.

Adult ; Drugs, Chinese Herbal ; therapeutic use ; Humans ; Impotence, Vasculogenic ; drug therapy ; physiopathology ; Male ; Middle Aged ; Penis ; blood supply ; diagnostic imaging ; Phytotherapy ; Regional Blood Flow ; drug effects ; physiology ; Ultrasonography, Doppler, Color