[Clinical practice guidelines of the Spanish Society of Cardiology on pacemakers]. / Guías de práctica clínica de la Sociedad Española de Cardiología en marcapasos.

Following a brief introduction on the history and generic codification of the different cardiac stimulation methods available, the implantation techniques are described and the requisites, such as human resources, their qualifications and the materials required, which are essential in the organization of a Pacemaker Unit are discussed. The current indications for permanent cardiac stimulation are reported and are classified by sections in tales following the 1998 norms of the ACC/AHA. In another section, the indications in special situations such as hypertrophic or dilated cardiomyopathy are described. Stimulation frequency modulation with the incorporation of biodetectors in modern pacemakers or in the probes are commented upon as is atriosynchronic ventricular stimulation with a single electrode (VDD). The recent automatisms which have been implemented in the current pacemakers are discussed and the most adequate selection of the stimulation mode for each patient is analyzed and demonstrated in a table which may be easily interpreted. On establishing the recommendable protocol for undertaking the follow up of the patient with a pacemaker, the criteria accepted as replacement indicators are discussed. In a brief section some legal aspects (drivers license, informed consent) are commented upon and the possible sources of interference with the function of the system implanted, whether medical or environmental or laboral, have been analyzed more in depth. The chapter ends with a brief discussion on the survival of patients with pacemakers.

[Endocardial monophasic action potentials obtained by means of suction catheters]. / Los potenciales de acción monofásicas endocárdicas obtenidos mediante catéteres de succión.

Endocardial monophasic active potentials (M.A.P.) recorded by suction --tip intracardiac catheters constitute a new research-- method in cardiac arrythmias, electrophysiology and pharmacology. The characteristics of MAP at auricular and ventricular levels are analyzed. The limitations of the method in its incapacity to record the MAP of conduction tissues is discussed. This method of recording MAP is evaluated with antiarrythmic drugs of tipes I, II, III and IV. The results are identical to recordings performed with intracellular microelectrodes.