Myocardial Reperfusion

Publication Title: 
American Journal of Physiology. Heart and Circulatory Physiology

Flavonoids within Scutellaria baicalensis may be potent antioxidants on the basis of our studies of S. baicalensis extract. To further this work, we studied the antioxidative effects of baicalein, a flavonoid component of S. baicalensis, in a chick cardiomyocyte model of reactive oxygen species (ROS) generation during hypoxia, simulated ischemia-reperfusion, or mitochondrial complex III inhibition with antimycin A. Oxidant stress was measured by oxidation of the intracellular probes 2',7'-dichlorofluorescin diacetate and dihydroethidium.

Author(s): 
Shao, Zuo-Hui
Vanden Hoek, Terry L.
Qin, Yimin
Becker, Lance B.
Schumacker, Paul T.
Li, Chang-Qing
Dey, Lucy
Barth, Eugene
Halpern, Howard
Rosen, Gerald M.
Yuan, Chun-Su
Publication Title: 
Resuscitation

The new resuscitation guidelines permit compressions before delayed, defibrillation, a change that has generally been welcomed. The benefits are generally assumed to relate to the immediate provision of limited coronary perfusion with protection or replenishment of myocardial metabolic reserves. In this paper we argue that the concept is inadequate to explain many experimental and clinical observations made during resuscitation attempts.

Author(s): 
Chamberlain, Douglas
Frenneaux, Michael
Steen, Stig
Smith, Andrew
Publication Title: 
American Journal of Physiology. Heart and Circulatory Physiology

Ischemic preconditioning (PC) has been proposed as an endogenous form of protection against-ischemia reperfusion injury. We have shown that PC does not prevent postischemic dysfunction in the aging heart. This phenomenon could be due to the reduction of cardiac norepinephrine release, and it has also been previously demonstrated that age-related decrease of norepinephrine release from cardiac adrenergic nerves may be restored by caloric restriction.

Author(s): 
Abete, Pasquale
Testa, Gianluca
Ferrara, Nicola
de Santis, Domenico
Capaccio, Pina
Viati, Luisa
Calabrese, Claudio
Cacciatore, Francesco
Longobardi, Giancarlo
Condorelli, Mario
Napoli, Claudio
Rengo, Franco
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