Sökning: "Ikr"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet Ikr.

  1. 1. Teratogenicity as a consequence of drug-induced embryonic cardiac arrhythmia : Common mechanism for almokalant, sotalol, cisapride, and phenytoin via inhibition of IKr

    Författare :Anna-Carin Sköld; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical biosciences; IKr; delayed rectifying K channel; embryonic cardiac arrhythmia; teratogenicity; Farmaceutisk biovetenskap; Biopharmacy; Biofarmaci; Toxicology; toxikologi;

    Sammanfattning : During the last years, drugs that prolong the repolarisation phase of the myocardial action potential, due to inhibition of the rapid component of the delayed-rectifying potassium channel (IKr) have been in focus. In addition to arrhythmogenic potential, selective Ikr-blockers have also been shown to be embryotoxic and teratogenic in animal studies. LÄS MER

  3. 2. Mechanism of Action of the Antiarrhythmic Agent AZD7009

    Författare :Frida Persson; Göteborgs universitet; []
    Nyckelord :atrial fibrillation; antiarrhythmic drug; IKr; IKur; Ito; IKs; IKACh; INa; ICaL; cardiac action potential; early afterdepolarisation;

    Sammanfattning : Atrial fibrillation (AF) is the most common tachyarrhythmia in the adult population and is a major cause of morbidity and mortality. AF can be terminated and sinus rhythm restored by prolonging the action potential duration (APD) and the refractory period. LÄS MER

  4. 3. Common mechanism for teratogenicity of antiepileptic drugs : Drug-induced embryonic arrhythmia and hypoxia-reoxygenation damage

    Författare :Faranak Azarbayjani; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical biosciences; Atiepileptik drugs; embryonic heart; arrhythmia; cleft palate; ROS; antioxidants; Ikr; Farmaceutisk biovetenskap; Biopharmacy; Biofarmaci; Toxicology; toxikologi;

    Sammanfattning : The Antiepilptic drugs (AEDs) phenytoin (PHT), carbamazepine (CBZ), phenobarbital (PB), tri- and dimethadione (TMD and DMD) are known teratogens having a common malformation pattern in human and animal studies. This thesis was designed chiefly to test a hypothesis correlating the teratogenicity of these AEDs to episodes of pharmacologically induced embryonic arrhythmia and hypoxia-reoxygenation damage. LÄS MER

  5. 4. Antiarrhythmic and arrhythmic effects of an Ikr-blocking class III agent. A clinical and electrocardiographic study of almokalant

    Författare :Birgitta Houltz; Göteborgs universitet; []
    Nyckelord :Almokalant; class III antiarrhythmic agent; potassium channel blocker; atrial fibrillation; sinus rhythm; conversion; electrocardiographic; QT interval prolongation; T wave morphology; prediction; torsades de pointes; proarrhythmia; QT dispersion; ventric;

    Sammanfattning : The interest in class III drugs has increased over the last decades as being potent antiarrhythmic agents in their mode of action by prolongation of repolarization and with no effect on conduction. Class I antiarrhythmic agents have proven effective in conversion of atrial fibrillation (AF), but may cause serious proarrhythmia. LÄS MER

  7. 5. Assessment of Drug-Induced Cardiotoxicity during Rat Embryo Development

    Författare :Mats Nilsson; William S. Webster; Nigel A. Brown; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : The potassium ion channel (hERG/IKr) is important for normal heart function and drug-induced blockade of the channel in adult humans can lead to irregular heart rhythms (arrhythmia).  The ion channel is also essential for early cardiac function in the embryo and therapeutic drugs which block this channel have been shown to cause birth defects in animal studies. LÄS MER