An apparatus comprising a portable device to acquire electrocardiographic signals of a patient, a display means, a drive means (6), an average data transfer (8), a means of storing data, a computer program and computing means, wherein: the portable device comprises a handle (5) constructed and arranged for manually holding the device, display means and an electrode array comprising four electrodes (11, 12, 13, 14) adapted for placement in a thoracic region of said patient such that can make electrical contact with the previous midthoracic skin of said patient to acquire electrocardiographic signals through the four electrodes (11, 12, 13, 14) the display means is adapted to display the electrocardiographic signals from said patient the drive means (6) is adapted to start capturing the electrocardiographic signals for a predetermined media data storage as a set of electrocardiographic data, time media data transfer (8) are arranged to transfer electrocardiographic signal or set of ECG data from the handheld device to the computer means, and the computer program is adapted to run on the computer means and adapted to acquire and manipulate the set of ECG data of the patient and to add identification data patient electrocardiographic data set to form a set of electrocardiographic data identified.Un aparato que comprende un dispositivo portátil para adquirir señales electrocardiográficas de un paciente, un medio de visualización, un medio de accionamiento (6), un medio de transferencia de datos (8), un medio de almacenamiento de datos, un programa informático y un medio informático, en donde: el dispositivo portátil comprende un mango (5) construido y dispuesto para sujetar manualmente el dispositivo, los medios de visualización y una matriz de electrodos que comprende cuatro electrodos (11, 12, 13, 14) adaptados para su colocación en una región torácica de dicho paciente de manera que se puede hacer contacto eléctrico con la piel torácica media anterior de dicho pacient
