A médica ouviu o paciente.

In Portuguese, it is very common to use the definite article before a noun: a médica = the doctor.

So:

• a = the for a feminine singular noun
• médica = doctor (female doctor)

Using just médica without a would usually sound incomplete in this sentence.

Portuguese nouns often show grammatical gender.

• médico = male doctor
• médica = female doctor

Here, the sentence is specifically talking about a female doctor, so médica is used.

The accent mark shows where the stress goes:

• MÉ-di-ca

Without the accent, the word would not follow normal spelling expectations. The accent helps indicate the correct pronunciation and stress.

Ouviu is in the preterite (simple past).

It means something like:

• heard
• listened to

In this sentence, it refers to a completed action in the past: the doctor heard/listened to the patient.

It comes from the verb ouvir, which means to hear or to listen to depending on context.

Some useful forms:

• ouvir = to hear / to listen
• eu ouvi = I heard
• ela ouviu = she heard
• ele ouviu = he heard
• você ouviu = you heard

Portuguese often leaves out subject pronouns when the subject is already clear.

Here, A médica is the subject, so there is no need to add ela.

• A médica ouviu o paciente. = natural
• A médica ela ouviu o paciente. = usually unnecessary or awkward in this context

Portuguese does this much more often than English.

Paciente is a noun that often has the same form for both masculine and feminine. The article shows the gender:

• o paciente = the male patient
• a paciente = the female patient

So in your sentence, o paciente tells you the patient is male.

O is the masculine singular form of the.

So:

• o paciente = the male patient
• a paciente = the female patient

Since paciente here refers to a male patient, the article is o.

Portuguese does not use the Spanish-style personal a.

Compare:

• Spanish: La médica oyó al paciente.
• Portuguese: A médica ouviu o paciente.

In Portuguese, the direct object usually appears without any extra marker like that.

Yes. The sentence follows the very common pattern:

• A médica = subject
• ouviu = verb
• o paciente = direct object

So it is a straightforward subject + verb + object sentence.

Yes, but A médica ouviu o paciente is the most neutral and natural order.

Portuguese can sometimes change word order for style, emphasis, or in questions, but for a basic statement this version is the standard one.

It can mean either, depending on context.

In Portuguese, ouvir often covers both ideas:

• hear
• listen to

So A médica ouviu o paciente could mean the doctor heard the patient or listened to the patient, depending on the situation.

Often, yes.

• ouviu comes from ouvir
• escutou comes from escutar

In many everyday contexts in Brazilian Portuguese, both can mean heard or listened to. However, ouvir is extremely common and very natural here.

In Brazilian Portuguese, ouviu is roughly pronounced like oh-VYOO, with the stress on the last syllable.

A rough breakdown:

• ou = sounds somewhat like oh
• viu = like vyoo

So: ou-VIU

Yes. Paciente can be:

• a noun: the patient
• an adjective: patient in the sense of calm or tolerant

In your sentence, it is clearly a noun because it has the article o and is the person receiving the action.

You would normally use a direct-object pronoun.

For a male patient:

• A médica ouviu-o. = The doctor heard him.

In spoken Brazilian Portuguese, people often avoid this form and may prefer other structures, but grammatically ouviu-o is the standard direct replacement in formal writing.