Described embodiments include a system that includes a radiofrequency-current (RF-current) generator and a processor. The processor is configured to cause the RF-current generator to generate a plurality of pulses of RF current for application to tissue of a subject, each of the pulses having a power whose maximum value is greater than 80 W and a duration that is less than 10 s, and an intermission between successive ones of the pulses being less than 10 s. The processor is further configured to, while each one of the pulses is applied to the tissue, receive at least one signal that indicates a measured temperature of the tissue, and, in response to the measured temperature, control the power of the pulse. Other embodiments are also described.Las modalidades descritas incluyen un sistema que incluye un generador de corriente de radiofrecuencia (corriente de RF) y un procesador; el procesador se configura para provocar que el generador de corriente de RF genere una pluralidad de pulsos de corriente de RF para aplicarse al tejido de un sujeto, teniendo cada uno de los pulsos una potencia cuyo valor maximo es mayor que 80 W y una duracion que es menor que 10 s, y siendo una pausa entre pulsos sucesivos menor que 10 s; el procesador se configura, ademas, para, mientras se aplica cada uno de los pulsos al tejido, recibir al menos una senal que indique una temperatura medida del tejido, y, en respuesta a la temperatura medida, controlar la potencia del pulso; tambien se describen otras modalidades.