SóProvas

ID
2339029
Banca
FCC
Órgão
TRE-SP
Ano
2017
Provas
Disciplina
Medicina
Assuntos

Ondas T de baixa voltagem e duração aumentada
Ondas U proeminentes
Bloqueio atrioventricular de 1° ou 2° graus
Arritmias diversas, principalmente se acompanhadas do uso de digitálicos

O texto acima refere-se às alterações eletrocardiográficas associadas à 

Alternativas
Comentários

  • Hypokalemia - Similar to hyperkalemia, hypokalemia produces changes on the ECG that are not necessarily related to the serum potassium level. There is depression of the ST segment, decrease in the amplitude of the T wave, and an increase in the amplitude of the U wave, best seen in leads V4 to V6 (waveform 8). U waves are often seen in the lateral precordial leads V4 to V6.
    Other findings associated with hypokalemia include the following:
    ●The U wave and T wave merge in some cases to form a T-U wave, which may be misdiagnosed as a prolonged QT interval.
    ●The P wave can become larger and wider and the PR interval may prolong slightly
    ●The QRS duration may increase when the hypokalemia is more severe; in addition, the ST segment becomes markedly depressed, and T waves are inverted.
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