4.3 Bipolar, Manic, Hypomanic & Cyclothymic Disorders – Comprehensive Study Notes

Overview of Bipolar & Related Disorders

Transition from unipolar (purely depressive) conditions to disorders that cycle between depression and elevated mood states.
Core elevated states:
- Mania
- Hypomania ("under-mania")
Disorders covered:
- Bipolar I
- Bipolar II
- Cyclothymic Disorder
- Specifier patterns: Mixed Features & Rapid Cycling

DSM-5 Criteria Sets

Manic Episode

Distinct period of abnormally & persistently:
- Elevated, expansive, or irritable mood, and
- Increased goal-directed activity or energy.
Duration: $\ge 1$ week (any duration if hospitalization is necessary).
During mood disturbance, $\ge 3$ (or $\ge 4$ if mood only irritable) of the following:
1. Inflated self-esteem / grandiosity.
2. Decreased need for sleep (e.g., "rested after 3 h").
3. Pressured speech / markedly increased talkativeness.
4. Flight of ideas / subjective racing thoughts.
5. Distractibility (observed or self-reported).
6. Increase in goal-directed activity (work, school, social, sexual).
7. Excessive involvement in activities with high potential for painful consequences (spending sprees, risky sex, foolish investments).
Clinically significant impairment, hospitalization, or psychotic features required.
Not attributable to substances/medical illness.

Hypomanic Episode

Same symptom list as mania but:
- Duration: $\ge 4$ consecutive days (lecture also referenced "≈ 12–15 days" as typical in practice).
- Change in functioning observable by others.
- Episode not severe enough for marked impairment/hospitalization.
- No psychotic features (if psychosis present ➔ diagnose manic episode).
Antidepressant-induced mood elevation counts only if persists beyond drug’s physiological effect.

Mania vs Hypomania (Quick Grid)

Symptoms: identical lists.
Severity & Consequences:
- Mania ⇒ marked impairment, may need hospitalization, may include psychosis.
- Hypomania ⇒ noticeable change, no marked impairment / hospitalization.
Minimum duration:
- Mania ⇒ $7$ days (or any time if hospitalized).
- Hypomania ⇒ $4$ days.

Bipolar I Disorder

Diagnostic hallmark: At least one full manic episode in lifetime.
- Even a single manic episode converts any prior Bipolar II diagnosis into Bipolar I.
Major Depressive Episodes (MDEs) are common but not required.
Typical course:
- Mania often preceded or followed by hypomanic or depressive episodes.
- "Shift in polarity" = depressive episode evolves into mania or vice-versa.
- If hypomania intensifies into mania, it is coded as one manic episode.

Bipolar II Disorder

Requires both:
1. $\ge 1$ Major Depressive Episode.
2. $\ge 1$ Hypomanic Episode.
No history of full mania (if full mania occurs ➔ re-diagnose as Bipolar I).
Patients may view hypomania as a period of “normal” or desirable productivity; family/friends usually observe problematic behavior.

Specifier Patterns

Mixed Features

During a MDE, presence of $\ge 3$ manic/hypomanic symptoms nearly every day.
Elevates suicide risk above pure depression or pure mania.
Treatment notes:
- Lithium less effective here.
- Many atypical antipsychotics FDA-approved for mixed states.

Rapid Cycling

$\ge 4$ mood episodes (MDE, mania, hypomania) within 12 months.
Dominated by depressive episodes; linked to:
- Higher suicide risk.
- More hospitalizations.
- Harder long-term control; emphasis on anti-depressant-stabilizing yet mania-preventing regimens.

Comparison:

Mixed Features: simultaneous depressive + manic symptoms.
Rapid Cycling: frequent separate episodes; symptoms usually not concurrent.

Cyclothymic Disorder

Chronic, fluctuating mood disturbance with numerous hypomanic & depressive symptoms that never meet full criteria for hypomanic, manic, or major depressive episodes.
Duration: $\ge 2$ years in adults (≥ 1 yr in children/adolescents).
- Symptomatic $\ge 50\%$ of the time.
- No symptom-free period > $2$ months.
Once criteria for MDE, mania, or hypomania are met, diagnosis shifts to Bipolar I or II.
Must cause distress/impairment; not better explained by substances, other mental or medical conditions (e.g., hyperthyroidism, multiple sclerosis).
Epidemiology:
- Community prevalence ≈ 3$–$5\%.
- Men = Women overall, but women seek treatment more in clinical settings.
- Onset typically in adolescence; > $50\%$ show symptoms before age 10.
- 50$–$60\% risk of later conversion to Bipolar I or II.

Epidemiology, Onset, & Course of Bipolar Disorders

Average onset for Bipolar I/II: late adolescence (~ 18 yrs).
Course usually intermittent:
- Most have multiple episodes across lifespan.
- Patients often describe life as "running faster and faster" prior to first mania.

Genetic & Physiological Risk Factors

Strong familial / genetic loading emphasized.
Physiological triggers: sleep disruption, substance use, certain medical illnesses.

Treatment Approaches

Pharmacotherapy

Lithium Carbonate
- Gold-standard mood stabilizer; useful for acute mania & prophylaxis.
- Decreases relapse rates when maintained between episodes.
- ~ $40\%$ non-response, especially in rapid-cycling or mixed-feature presentations.
- Side effects: nausea, memory problems, weight gain, tremor, impaired coordination ➔ adherence issues.
Anticonvulsants (e.g., Valproic Acid/Depakote)
- > $50\%$ response; effective for acute mania, mixed states, rapid cycling.
- Can reduce episode frequency/severity.
- Side effects: GI distress, sedation.
Atypical Antipsychotics
- Many are FDA-approved for mania & mixed episodes; often combined with mood stabilizers.

Psychotherapy (Adjunctive)

Cognitive Therapy (CT): targets stress appraisals & medication adherence.
Interpersonal & Social Rhythm Therapy (IPSRT):
- Links episode recurrence to life-stress & disrupted daily rhythms (sleep/work);
- Trains patients to maintain stable routines + medication compliance.
Evidence: Combined medication + psychotherapy superior to meds alone.

Electroconvulsive Therapy (ECT)

Last-line for severe, treatment-resistant bipolar depression or mania.
Protocol: ≈ $3$ sessions/week for $2–7$ weeks (total $6–8$ + treatments).
Unilateral (non-dominant hemisphere) placement minimizes memory loss but may lower efficacy.
Procedure:
- Muscle relaxant & anesthesia given to prevent injury.
- Acute cognitive side effects (memory) usually short-lived; no evidence of long-term neuronal damage.

Behavioral & Ethical/Practical Implications

Manic/hypomanic impulsivity (e.g., risky sex, destructive spending) leads to financial, legal, and interpersonal harm.
Mixed features & rapid cycling elevate suicide risk ➔ necessitate vigilant monitoring.
Medication adherence complicated by:
- Desire to keep hypomanic "productivity".
- Side-effect burden (lithium, anticonvulsants).
- Psychoeducation critical.
Early-onset cyclothymia offers a window for early intervention to prevent progression.
Sociocultural note: Under-treatment in men (lower help-seeking) & limited data on gender-diverse populations.

Quick Reference Equations & Numbers

Manic duration: $\text{Duration}_{\text{mania}} \ge 7 \text{ days}$ .
Hypomanic duration: $\text{Duration}_{\text{hypomania}} \ge 4 \text{ days}$ .
Rapid cycling specifier: $\text{Episodes}_{\text{12 mo}} \ge 4$ .
Mixed features threshold: \text{Manic\/Hypomanic Symptoms} \ge 3 during MDE.
Cyclothymia chronicity: $\ge 2 \text{ yrs (adults)}$ , $\ge 1 \text{ yr (youth)}$ with < 2 \text{ mo} symptom-free.

High-Yield Takeaways

Any history of full mania ➔ Bipolar I, regardless of depressive history.
Bipolar II ≠ “milder”— depression burden often greater; suicide risk similar or higher.
Mixed features & rapid cycling are red flags for suicide and medication resistance.
Lithium remains first-line but watch for side effects & partial response; anticonvulsants and atypical antipsychotics fill gaps.
Psychotherapy (esp. IPSRT) enhances medication adherence & rhythm stabilization.
ECT is safe and effective when all else fails, despite stigma.