Bipolar I, bipolar II, and cyclothymic disorder: Clinical sciences

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Introduction0:00–0:35

Bipolar spectrum disorders refer to psychiatric conditions characterized by mood instability, which cause a sudden shift in how a person thinks, feels, and behaves.
These disorders can lead to significant personal distress, strain relationships, and impair occupational functioning. Additionally, the depressive symptoms in bipolar spectrum disorders significantly increase the risk of self-harm and suicidality.
Bipolar spectrum disorders include bipolar 1 disorder, bipolar 2 disorder, and cyclothymic disorder. Now, when a patient presents with a chief concern suggesting a bipolar spectrum disorder, first perform a safety assessment to determine the risk of self-harm or harm to others.

Safety assessment0:35–1:34

Look for signs of psychosis such as agitation, paranoia, aggression, auditory or visual hallucinations, and disorganized thoughts, speech, or behavior.
Also, watch for manic symptoms like fast talking, reduced need for sleep, and an increase in goal-directed activity. Be sure to ask about thoughts of harming oneself or others and assess their severity and intent including any plans or actions.
Patients with psychosis, mania, active thoughts of harm, or suicidal tendencies are at high risk and need acute management involving psychiatric hospitalization, pharmacologic stabilization, and a one-to-one sitter, if appropriate.
In severe or resistant cases, consider electroconvulsive therapy or ECT. On the other hand, if the patient is at low risk of harm to self and others, obtain a focused history and physical exam.

History and Physical examination1:34–2:54

They may describe a persistently euphoric, irritable, or depressed mood that is significantly different from their baseline and may report frequent mood changes.
Also, be sure to ask about the family history of bipolar disorder among first-degree relatives because there is a strong genetic component.
The physical exam may reveal changes in appearance, such as being unusually unkempt, or psychomotor changes, like slowed or agitated movements.
Additionally, their rate of speech may be increased or decreased, and they may demonstrate extremes of affect, ranging from flat to exaggerated facial expressions.
With these findings, suspect bipolar spectrum disorder. Here’s a clinical pearl!
During history and physical exams, look for signs that your patient's mood symptoms could be attributed to a medical condition or substance use.
For example, they might have hypothyroidism contributing to depression, or encephalitis presenting with manic symptoms. Additionally, intoxication or withdrawal from substances like alcohol, cocaine, amphetamines, opioids, and benzodiazepines can also lead to mood disturbances.
Okay, your next step is to assess for a current or past manic episode using DSM-5 criteria. Manic episodes have a persistently euphoric or irritable mood with increased energy.

Manic episode2:54–7:01

There must be at least 3 of the following symptoms, easily remembered using the mnemonic DIG-FAST: Distractibility; Irresponsibility, characterized by risky behaviors like reckless driving, shopping sprees, and sexual indiscretion; Grandiosity and unrealistic self-confidence; Flight of ideas; increased goal-oriented Activities with excessive planning, multitasking, and increased sociability and sexual drive; psychomotor Agitation; decreased Sleep yet feeling refreshed and lively; and rapid, hard-to-interrupt Talkativeness.
Manic symptoms may co-occur with psychotic features such as hallucinations, delusions, or disorganized thought patterns.
These symptoms should persist for at least one week, or any duration requiring hospitalization due to severity, and they must cause clinically significant impairment.
If all criteria are met for a current or past manic episode, diagnose bipolar 1 disorder. Here’s another clinical pearl!
Mood episodes in bipolar 1 alternate between mania, hypomania, and depression. These episodes are often interspersed with periods of stable mood, but a person may switch directly from one pole, mania, to the other pole, depression.
Moving on, the initial treatment of bipolar 1 disorder involves monotherapy with a single mood stabilizer like lithium, valproate, or lamotrigine.
If ineffective, consider adding a second-generation antipsychotic such as quetiapine, olanzapine, risperidone, or aripiprazole.
In cases of severe treatment resistance, consider ECT, or even transcranial magnetic stimulation, also called TMS. Finally, there should be maintenance with long-term pharmacotherapy, alongside psychoeducation and psychotherapy.
Time for some high-yield facts! Lithium, valproate, and lamotrigine are mood stabilizers frequently used in the management of bipolar spectrum disorders.
Lithium and valproate are effective at treating acute mania and can also be used as long-term treatment to prevent manic and depressive episodes.
On the other hand, lamotrigine is primarily used to manage bipolar depression and may be continued long-term to prevent depressive episodes.
Each of these medications requires some clinical oversight to ensure safety and effectiveness. For example, lithium and valproate require regular blood tests to monitor therapeutic levels and avoid toxicity, while lamotrigine carries a risk of severe skin reactions, such as Stevens-Johnson syndrome.
Now, in psychiatry, treatment resistance refers to when a mental health condition does not respond or worsens despite treatment with appropriate medications.
Treatment-resistant mania may respond to ECT, which uses electricity to induce controlled seizures, altering brain chemistry and neural circuitry.
On the flip side, treatment-resistant bipolar depression may respond to TMS, which uses magnetic pulses to stimulate nerve cells in the brain.
Finally, psychotherapy plays a key role in managing bipolar disorders. It promotes self-understanding, teaches healthier coping mechanisms, and helps to build social support.
There are different types of psychotherapy, such as cognitive-behavioral therapy or CBT, which targets negative thought patterns and behaviors; interpersonal and social rhythm therapy, which focuses on relationships and daily routines for mood stabilization; and family-focused intervention, which educates and collaborates with family members for improved patient management.
Tailoring these approaches to individual needs and preferences is essential. Now let’s go back to DSM-5 and look at situations when there are no manic episodes.

Hypomanic episode7:01–9:22

In this case, assess for a current or past hypomanic episode using the DSM-5 criteria. Like mania, hypomania is characterized by a euphoric or irritable mood with increased energy, and the presence of 3 or more DIG-FAST symptoms.
However, the symptoms of hypomania are not severe enough to require hospitalization and there are no psychotic features.
The symptoms must last 4 or more consecutive days and cause a clinically significant change in function, but they cannot be severe enough to cause impairment.
If all criteria for a current or past hypomanic episode are met, diagnose bipolar 2 disorder. Here’s another clinical pearl!
Individuals with bipolar 2 must have experienced at least 1 hypomanic episode, 1 major depressive episode, but never experienced a manic episode.
Like bipolar 1, mood episodes in bipolar 2 disorder recur, with major depressive episodes being more frequent, longer lasting, and more severe compared to bipolar 1.
While bipolar 1 is often seen as more severe due to manic episodes, both disorders can be equally disruptive and impairing.
Alright, when it comes to treatment, the first-line option for bipolar 2 disorder typically involves monotherapy with a mood stabilizer.
If monotherapy proves ineffective, add a second-generation antipsychotic. In cases of severe treatment resistance, consider ECT or TMS.
Once an effective treatment is found, maintenance involves long-term pharmacotherapy, psychoeducation, and psychotherapy.
Here’s an important clinical pearl to keep in mind! Individuals with bipolar disorder often present during a major depressive episode.
So, be sure to assess all depressed patients for any history of mania or hypomania, as starting antidepressant monotherapy might unmask manic or hypomanic symptoms.
Additionally, after diagnosing major depressive disorder and initiating antidepressant therapy, monitor the patient for new manic or hypomanic symptoms.

Cyclothymia9:22–10:59

Okay, let’s take one more trip back to the DSM-5 criteria. If a patient presents with frequent mood swings but has no manic or hypomanic episodes, suspect cyclothymia and assess the DSM-5 criteria.
Cyclothymia, also known as cyclothymic disorder, is characterized by a persistent pattern of unpredictable mood changes lasting over two years in adults or over one year in children.
During this period, the patient must experience periods of hypomanic symptoms alternating with periods of depressive symptoms, without symptom-free intervals lasting more than two months.
These symptoms must cause clinically significant distress or impairment. If all criteria are met, diagnose cyclothymia.
The management of cyclothymia begins with psychoeducation and CBT to promote understanding and awareness of the condition.
This also helps provide practical tools and strategies to bring positive changes and maintain stability. Sometimes, your patient might need a mood stabilizer as well.
Here’s one more clinical pearl! Individuals, especially children diagnosed with cyclothymia, are at an increased risk of developing bipolar disorder.
If the mood symptoms in cyclothymia intensify to meet criteria for a manic, hypomanic, or major depressive episode, update the diagnosis to bipolar or major depressive disorder as appropriate.
Early identification and management of cyclothymia are crucial to prevent or mitigate this progression. Alright, as a quick recap...

Review10:59–11:49

When assessing a patient for a bipolar spectrum disorder, first ensure their safety, then obtain a focused history and physical exam.
Use the DSM-5 criteria to assess for manic and hypomanic episodes. A current or past manic episode suggests bipolar 1 disorder; while a current or past hypomanic episode combined with a major depressive episode indicates bipolar 2 disorder.
Both bipolar 1 and 2 are treated with mood stabilizers, which may be combined with a second-generation antipsychotic, followed by psychoeducation and psychotherapy.
In contrast, cyclothymic disorder, characterized by frequent mood swings lasting over two years, is managed with psychoeducation and CBT, and may include a mood stabilizer.
Bipolar I, bipolar II, and cyclothymic disorder | Osmosis