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Questions and Answers
Qual es un exemplo de un medicament que bloquea canales de sodio e causa arritmias ventriculares?
Qual es un exemplo de un medicament que bloquea canales de sodio e causa arritmias ventriculares?
- Metoprolol
- Atenolol
- Lidocaine (correct)
- Verapamil
Qual es le effecto principal de un β-blocker in le cordio?
Qual es le effecto principal de un β-blocker in le cordio?
- Diminution del depolarisation spontane (correct)
- Prolongation del potential de action
- Incremente del taxa de pulsos
- Aumento del contraction
Qual medicament es un exemplo de bloqueador de canales de potasio?
Qual medicament es un exemplo de bloqueador de canales de potasio?
- Procainamide
- Diltiazem
- Flecainide
- Amiodarone (correct)
Qual effecto es associato con le bloqueadores de canales de calcio L-type?
Qual effecto es associato con le bloqueadores de canales de calcio L-type?
Qual es un exemplo de medication usate pro controlar le taxa de pulsos?
Qual es un exemplo de medication usate pro controlar le taxa de pulsos?
Flashcards
Blockada de canales de sodio
Blockada de canales de sodio
Reduz el numero de canales de Na+, causa arritmias.
Antagonistas beta-adrenergicos
Antagonistas beta-adrenergicos
Reduce la depolarisation e conduccion, provoca bloqueos AV.
Blockada de canales de potasio
Blockada de canales de potasio
Prolonga la durada del potencial de accion, causa arritmias.
Blockada de canales de calcio L-type
Blockada de canales de calcio L-type
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Control de ritmo
Control de ritmo
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Study Notes
Vaughan Williams Classification
- Class Ia: Sodium channel blockade, increasing the duration of action potential, leading to supraventricular and ventricular arrhythmias. Drugs include disopyramide, procainamide, quinidine.
- Class Ib: Sodium channel blockade affecting abnormal heart tissue, prolonging ventricular arrhythmias. Drugs include Lidocaine and mexiletine.
- Class Ic: Sodium channel blockade, affecting the number of potassium channels and inward calcium channels; minimal effect on repolarization; mainly affecting atrioventricular and ventricular arrhythmias. Drugs include flecainide and propafenone.
- Class II: Beta-adrenergic receptor antagonist (beta-blocker), decreasing spontaneous depolarization and conduction, used to treat atrial and ventricular arrhythmias. Drugs include atenolol, bisoprolol, metoprolol, propranolol, esmolol.
- Class III: Potassium channel blockade, prolonging the duration of action potential, used to treat supraventricular and ventricular arrhythmias. Drugs include amiodarone and sotalol.
- Class IV: Calcium channel blockade of the L-type, reducing conduction velocity and contractility, used to treat supraventricular arrhythmias. Drugs include verapamil and diltiazem.
Rhythm Control vs. Rate Control
- Rhythm control: Aims to restore a normal heart rhythm. Drugs include amiodarone, flecainide, and sotalol.
- Rate control: Aims to slow the heart rate. Drugs include metoprolol, verapamil, and digoxin.
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